Demonstrators protest Arizona's new immigration law outside the US embassy in Mexico City, Wednesday July 28, 2010. The banner and T-shirts read in Spanish "Boycott Arizona's law, don't buy US products." (AP Photo/Alexandre Meneghini)

A protester holds a sign at a demonstration against Arizona's new immigration law outside the US embassy in Mexico City, Wednesday July 28, 2010. (AP Photo/Alexandre Meneghini)

Protesters attend a demonstration against Arizona's new immigration law outside the US embassy in Mexico City, Wednesday July 28, 2010. Their T-shirts read in Spanish "Boycott Arizona's law, don't buy US products." (AP Photo/Alexandre Meneghini)

A protester holds a sign in the likeness of the US flag at a demonstration against Arizona's new immigration law outside the US embassy in Mexico City, Wednesday July 28, 2010. (AP Photo/Alexandre Meneghini)

This photo taken from a computer screen in Mexico City on Tuesday, July 27, 2010, shows the internet site twitpic.com, with an undated photo of what appears to be the kidnapped Mexican politician Diego Fernandez de Cevallos. Newspaper columnist Jose Cardenas wrote Tuesday that he received two letters and a photo from an e-mail address that roughly translates as "mysterious kidnappers" containing photos of a blindfolded man who resembles Fernandez de Cevallos. (AP Photo/Alexandre Meneghini)

In this April 4, 2010 photo, Esperanza Fajardo, left, her neighbor Gloria Ortiz, center, and Ortiz's daughter Selene Ortiz, talk to the Associated Press in Lazaro Cardenas, Mexico. Fajardo's husband, Juan Carlos Castro, and two other men with no criminal records were taken away by gunmen and presented by federal police in Mexico City as terrorists and members of the Zeta drug cartel, responsible for throwing hand grenades into a crowd during celebrations of Mexican independence in 2008. At least 16 people told authorities they saw all three men that night in Lazaro Cardenas, more than 300 miles (500 kilometers) from where the attacks occurred. (AP Photo/Alexandre Meneghini)

This March 27, 2009 file photo shows Milan's player Alexandre Pato during a training session at Granja Comary, in Teresopolis, Rio de Janeiro, Brazil. He was summoned by coach Mano Menezes on Monday, July 26 to play for the Brazilian soccer team, which will face US. in a friendly FIFA match, in August 10. Photo: MARCOS D'PAULA/AGÊNCIA ESTADO/AE (Agencia Estado via AP Images)

* ADAVANCE FOR SUNDAY, AUG. 1 **+ In this photo taken April 4, 2010, Esperanza Fajardo, left, her neighbor Gloria Ortiz, center, and Ortiz's daughter Selene Ortiz, talk to the Associated Press in Lazaro Cardenas, Mexico. Fajardo's husband, Juan Carlos Castro, and two other men with no criminal records were taken away by gunmen and presented by federal police in Mexico City as terrorists and members of the Zeta drug cartel, responsible of throwing hand grenades into a crowd during celebrations of Mexican independence in 2008. At least 16 people told authorities they saw all three men that night in Lazaro Cardenas, more than 300 miles (500 kilometers) from where the attacks occurred. (AP Photo/Alexandre Meneghini)

Three-time Tour de France winner Alberto Contador of Spain ambraces his teammate, Alexandre Vinokourov of Kazakhstan, right after the 20th and last stage of the Tour de France cycling race over 102.5 kilometers (63.7 miles) with start in Longjumeau and finish in Paris, FRANCE, Sunday, July 25, 2010./Credit:STEVENS FREDERIC/SIPA/1007260826 (Sipa via AP Images)

Alexandre Vinokourov of Kazakhstan cycles up the Champs Elysees during a victory lap for teammate Alberto Contador of Spain after the 20th and last stage of the Tour de France cycling race over 102.5 kilometers (63.7 miles) with start in Longjumeau and finish in Paris, France, Sunday, July 25, 2010. (AP Photo/Christophe Ena, POOL)

Three-time Tour de France winner Alberto Contador of Spain puts his arm around teammate Alexandre Vinokourov of Kazakhstan during a victory lap with his Astana teammates after the 20th and last stage of the Tour de France cycling race over 102.5 kilometers (63.7 miles) with start in Longjumeau and finish in Paris, France, Sunday, July 25, 2010. (AP Photo/Christophe Ena, POOL)

Alberto Contador of Spain, wearing the overall leader's yellow jersey, right, and teammate Alexandre Vinokourov of Kazakhstan, left, toast to Contador's third Tour victory during the 20th and last stage of the Tour de France cycling race over 102.5 kilometers (63.7 miles) with start in Longjumeau and finish in Paris, France, Sunday, July 25, 2010. (AP Photo/Christophe Ena)

Sirene Itzl poses for photos in celebration of her 15th birthday, or quinceanera, in Mexico City, Friday July, 23, 2010. The quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish-speaking countries. (AP Photo/Alexandre Meneghini)

Sirene Itzl sits with friends in a limousine as they celebrate her 15th birthday, or quinceanera, in Mexico City, Friday July 23, 2010. The quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish-speaking countries. (AP Photo/Alexandre Meneghini)

Sirene Itzl gets ready for a photo session in celebration of her 15th birthday, or quinceanera, in Mexico City, Friday July 23, 2010. The quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish-speaking countries. (AP Photo/Alexandre Meneghini)

Sirene Itzl poses for photos in celebration of her 15th birthday, or quinceanera, in Mexico City, Friday July, 23, 2010. The quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish-speaking countries. (AP Photo/Alexandre Meneghini)

Colombia's President-elect Juan Manuel Santos, left, speaks during a press conference at Los Pinos presidential residence in Mexico City, next to Maria Angela Holguin, who will be Colombia's Foreign Affairs Minister during his government, Thursday, July 22, 2010. Santos is on a one-day visit to Mexico. (AP Photo/Alexandre Meneghini)

Colombia's President-elect Juan Manuel Santos waves to members of the media after a press conference at Los Pinos presidential residence in Mexico City, Thursday, July 22, 2010. Santos is on a one-day visit to Mexico. (AP Photo/Alexandre Meneghini)

Colombia's President-elect Juan Manuel Santos speaks during a press conference at Los Pinos presidential residence in Mexico City, Thursday, July 22, 2010. Santos is on a one-day visit to Mexico. (AP Photo/Alexandre Meneghini)

Colombia's President-elect Juan Manuel Santos speaks during a press conference at Los Pinos presidential residence in Mexico City, Thursday, July 22, 2010. Santos is on a one-day visit to Mexico. (AP Photo/Alexandre Meneghini)

Colombia's President-elect Juan Manuel Santos arrives for a press conference at Los Pinos presidential residence in Mexico City, Thursday, July 22, 2010. Santos is on a one-day visit to Mexico. (AP Photo/Alexandre Meneghini)

An activist has food coloring made to look like oil poured on her forehead before a protest against BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. (AP Photo/Alexandre Meneghini)

An activist covered in food coloring made to look like oil protests BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. (AP Photo/Alexandre Meneghini)

Activists covered in food coloring made to look like oil protest BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. The sign at far left reads in Spanish "Petroleum kills animals." (AP Photo/Alexandre Meneghini)

** CORRECTS OIL TO FOOD COLORING MADE TO LOOK LIKE OIL ** Activists covered in food coloring made to look like oil protest BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. The sign at far left reads in Spanish "Petroleum kills animals." (AP Photo/Alexandre Meneghini)

Activists covered in food coloring made to look like oil protest BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. The sign reads in Spanish "Petroleum kills animals." (AP Photo/Alexandre Meneghini)

** CORRECTS OIL TO FOOD COLORING MADE TO LOOK LIKE OIL ** Activists covered in food coloring made to look like oil protest BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. The sign reads in Spanish "Petroleum kills animals." (AP Photo/Alexandre Meneghini)

Activists covered in food coloring made to look like oil protest BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. (AP Photo/Alexandre Meneghini)

An activist covered in food coloring made to look like oil protests BP's oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. (AP Photo/Alexandre Meneghini)

An activist covered in black ink made to look like oil protests the BP oil spill in the Gulf of Mexico in Mexico City, Thursday July 22, 2010. (AP Photo/Alexandre Meneghini)

Robert Zoellick, president of the World Bank, listens to journalists during a press conference at Los Pinos presidential residence in Mexico City, Wednesday, July 21, 2010. Zoellick said the world economic recovery is under way but still fragile in some areas, and estimated that 60 million people had slid into poverty during the 2008-2009 economic downturn, including 10 million in Latin America. (AP Photo/Alexandre Meneghini)

Robert Zoellick, president of the World Bank, left, speaks with Mexico's Secretary of the Treasury Ernesto Cordero Arroyo, during a press conference at Los Pinos presidential residence in Mexico City, Wednesday, July 21, 2010. Zoellick said the world economic recovery is under way but still fragile in some areas, and estimated that 60 million people had slid into poverty during the 2008-2009 economic downturn, including 10 million in Latin America. (AP Photo/Alexandre Meneghini)

Robert Zoellick, president of the World Bank, listens to journalists during a press conference at Los Pinos presidential residence in Mexico City, Wednesday, July 21, 2010. Zoellick said the world economic recovery is under way but still fragile in some areas, and estimated that 60 million people had slid into poverty during the 2008-2009 economic downturn, including 10 million in Latin America. (AP Photo/Alexandre Meneghini)

Robert Zoellick, president of the World Bank, left, speaks during a press conference as Mexico's Secretary of the Treasury Ernesto Cordero Arroyo looks on, at Los Pinos presidential residence in Mexico City, Wednesday, July 21, 2010. Zoellick said the world economic recovery is under way but still fragile in some areas, and estimated that 60 million people had slid into poverty during the 2008-2009 economic downturn, including 10 million in Latin America. (AP Photo/Alexandre Meneghini)

Alexandre Vinokourov of Kazakhstan, center, uses his mobile phone to record some video of the training ride with teammate and overall leader Alberto Contador of Spain, left, on the second rest day of the Tour de France cycling race in Pau, Pyrenees region, France, Wednesday, July 21, 2010. (AP Photo/Bas Czerwinski)

Andy Schleck of Luxembourg, Jurgen van den Broeck of Belgium, Alexandre Vinokourov of Kazakhstan, and Levi Leipheimer of the US, from left to right, climb towards Port de Bales pass during the 15th stage of the Tour de France cycling race over 187.5 kilometers (116.5 miles) with start in Pamiers and finish in Bagneres-de-Luchon, Pyrenees region, France, Monday, July 19, 2010. (AP Photo/Christophe Ena)

Alexandre Vinokourov of Kazakhstan, Jurgen van den Broeck of Belgium, Andy Schleck of Luxembourg, and Ryder Hesjedal of Canada, from left to right, climb towards Port de Bales pass during the 15th stage of the Tour de France cycling race over 187.5 kilometers (116.5 miles) with start in Pamiers and finish in Bagneres-de-Luchon, Pyrenees region, France, Monday, July 19, 2010. (AP Photo/Bas Czerwinski)

Andy Schleck of Luxembourg strains as he sprints towards the finish line during the 15th stage of the Tour de France cycling race over 187.5 kilometers (116.5 miles) with start in Pamiers and finish in Bagneres-de-Luchon, Pyrenees region, France, Monday, July 19, 2010. Center is Jurgen van den Broeck of Belgium, rear is Alexandre Vinokourov of Kazakhstan. (AP Photo/Laurent Rebours)

Andy Schleck of Luxembourg, Jurgen van den Broeck of Belgium, Alexandre Vinokourov of Kazakhstan, Levi Leipheimer of the US, Ryder Hesjedal of Canada, and Nicholas Roche of Ireland, climb towards Port de Bales pass during the 15th stage of the Tour de France cycling race over 187.5 kilometers (116.5 miles) with start in Pamiers and finish in Bagneres-de-Luchon, Pyrenees region, France, Monday, July 19, 2010. (AP Photo/Christophe Ena)

A reveler performs during the "32th Arraial de Belo Festival", as part of the solstice celebrations, at Estacao Square, in central Belo Horizonte, Minas Gerais, on Sunday, July 18, 2010. Photo: ALEXANDRE GUZANSHE/FOTO ARENA/AE (Agencia Estado via AP Images)

Revelers perform during the "32th Arraial de Belo Festival", as part of the solstice celebrations, at Estacao Square, in central Belo Horizonte, Minas Gerais, on Sunday, July 18, 2010. Photo: ALEXANDRE GUZANSHE/FOTO ARENA/AE (Agencia Estado via AP Images)

Revelers perform during the "32th Arraial de Belo Festival", as part of the solstice celebrations, at Estacao Square, in central Belo Horizonte, Minas Gerais, on Sunday, July 18, 2010. Photo: ALEXANDRE GUZANSHE/FOTO ARENA/AE (Agencia Estado via AP Images)

Revelers perform during the "32th Arraial de Belo Festival", as part of the solstice celebrations, at Estacao Square, in central Belo Horizonte, Minas Gerais, on Sunday, July 18, 2010. Photo: ALEXANDRE GUZANSHE/FOTO ARENA/AE (Agencia Estado via AP Images)

Revelers perform during the "32th Arraial de Belo Festival", as part of the solstice celebrations, at Estacao Square, in central Belo Horizonte, Minas Gerais, on Sunday, July 18, 2010. Photo: ALEXANDRE GUZANSHE/FOTO ARENA/AE (Agencia Estado via AP Images)

Revelers perform during the "32th Arraial de Belo Festival", as part of the solstice celebrations, at Estacao Square, in central Belo Horizonte, Minas Gerais, on Sunday, July 18, 2010. Photo: ALEXANDRE GUZANSHE/FOTO ARENA/AE (Agencia Estado via AP Images)

Stage winner Alexandre Vinokourov of Kazakhstan holds the trophy on the podium after the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Bas Czerwinski)

Stage winner Alexandre Vinokourov of Kazakhstan raises both arms on the podium after the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Laurent Rebours)

Stage winner Alexandre Vinokourov of Kazakhstan applauds on the podium after the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Laurent Rebours)

Stage winner Alexandre Vinokourov of Kazakhstan raises both arms on the podium after the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Laurent Rebours)

Alexandre Vinokourov of Kazakhstan crosses the finish line to win the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Laurent Rebours)

Alexandre Vinokourov of Kazakhstan crosses the finish line to win the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010, second ahead of the sprinting pack, rear. (AP Photo/Laurent Rebours)

Stage winner Alexandre Vinokourov of Kazakhstan looks back to make sure he has enough advantage on the sprinting pack as he heads to the finish line to win the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Laurent Rebours)

Alexandre Vinokourov of Kazakhstan crosses the finish line to win the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Peter Dejong)

Alexandre Vinokourov of Kazakhstan crosses the finish line to win the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Laurent Rebours)

Alexandre Vinokourov of Kazakhstan crosses the finish line to win the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Laurent Rebours)

Alexandre Vinokourov of Kazakhstan, right, and Alberto Contador of Spain, second from right, ride in the pack during the 13th stage of the Tour de France cycling race over 196 kilometers (121.8 miles) with start in Rodez and finish in Revel, France, Saturday, July 17, 2010. (AP Photo/Bas Czerwinski)

Alexandre Vinokourov of Kazakhstan rides in the breakaway group during the 12th stage of the Tour de France cycling race over 210.5 kilometers (130.8 miles) with start in Bourg-de-Peage, and finish in Mende, France, Friday, July 16, 2010. (AP Photo/Christophe Ena)

Ryder Hesjedal of Canada leads the breakaway group with Vasil Kyryienka of Belarus, far left, Andreas Kloden of Germany, second right, and Alexandre Vinokourov of Kazakhstan, second left, during the 12th stage of the Tour de France cycling race over 210.5 kilometers (130.8 miles) with start in Bourg-de-Peage, and finish in Mende, France, Friday, July 16, 2010. (AP Photo/Bas Czerwinski)

Ryder Hesjedal of Canada leads the breakaway group with Vasil Kyryienka of Belarus, far left, Andreas Kloden of Germany, second left, and Alexandre Vinokourov of Kazakhstan, right, during the 12th stage of the Tour de France cycling race over 210.5 kilometers (130.8 miles) with start in Bourg-de-Peage, and finish in Mende, France, Friday, July 16, 2010. (AP Photo/Bas Czerwinski)