This Saturday, April 17, 2010 satellite image provided Monday, April 19, 2010 by GeoEye shows a smoky plume of volcanic ash rising from the Eyjafjallajokull volcano in southern Iceland. European officials carved up the sky Monday, creating three zones to more quickly break the flight deadlock caused by volcanic ash flowing from Iceland over Europe. (AP Photo/GeoEye)

This satellite image released by GeoEye shows Washington on April 4, 2009 . (AP Photo/GeoEye Satellite Image)

This satellite image released by GeoEye shows Washington after this weekend's snow storm, Monday Feb. 8, 2010. Federal workers and school children got a day off Monday as the Mid-Atlantic region dug out from as much as 3 feet of snow that made travel nearly impossible and knocked out power to tens of thousands of people. (AP Photo/GeoEye Satellite Image)

In this satellite image provided by GeoEye, shows the Toussaint L’Ouverture International Airport, Port-au-Prince, Haiti taken on Saturday Jan. 16, 2010. A 7.0-magnitude earthquake struck the area on Jan. 12. (AP Photo/GeoEye Satellite Image)

This Jan. 13, 2010 satellite image from GeoEye Satellite Image shows Port-au-Prince, Haiti with the crumpled presidential palace, center, the day after a 7.0-magnitude earthquake hit the Caribbean nation. (AP Photo/GeoEye Satellite Image)

This Jan. 13, 2010 satellite image from GeoEye Satellite Image shows Port-au-Prince, Haiti with the crumpled presidential palace, center, the day after a 7.0-magnitude earthquake hit the Caribbean nation. (AP Photo/GeoEye Satellite Image)

This one-meter resolution image of Fort Hood, Texas was taken July 12, 2009 by GeoEye's IKONOS satellite, while flying 423 miles above the Earth at an average speed of 17,500 mph. Mandatory photo credit: "GeoEye Satellite Image." (GeoEye via AP Images)

This July 12, 2009 satellite image provided Friday, Nov. 6, 2009 by GeoEye shows the Soldier Readiness Center building, the white octagonal building at center, at Fort Hood, Texas where Army psychiatrist Maj. Nidal Malik Hasan allegedly opened fire on fellow soldiers Thursday, Nov. 5, killing at least 13 people. (AP Photo/GeoEye)

This combination of two satellite images provided by GeoEye show an area about 20 miles north northeast of Qom, Iran. The photo at left shows the site on Feb. 5, 2000, and the photo at right shows the same site on Sept. 26, 2009. Although there is no confirmation, analysts at both the Washington-based Institute for Science and International Security and London-based IHS Jane's believe the facility in the satellite photo at right is most likely the newly revealed centrifuge facility. (AP Photo/GeoEye Satellite Image, IHS Jane's Analysis) MANDATORY CREDIT

This satellite image taken Saturday Sept. 26, 2009, provided by GeoEye shows a facility under construction inside a mountain located about 20 miles north northeast of Qom, Iran. Although there is no confirmation, analysts at both the Washington-based Institute for Science and International Security and London-based IHS Jane's believe this satellite photo of a site on a military base near Qom, Iran, is most likely the location of the newly revealed centrifuge facility. Analysts at both ISIS and Jane's point to apparent tunnel entrances leading into a mountain. (AP Photo/GeoEye Sateliite Image, IHS Jane's Analysis)

FILE -This Sept. 26, 2009 satellite file image provided by GeoEye shows a facility under construction inside a mountain located about 20 miles north northeast of Qom, Iran. A senior official says, Monday, Nov. 16, 2009, the U.N nuclear agency believes Iran plans to start enriching uranium at a previously secret facility in 2011. A senior international official familiar with a new IAEA report said Monday that number could allow Iran to enrich enough material to be able to arm one nuclear warhead a year. (AP Photo/GeoEye Satellite Image, IHS Jane's Analysis, File)

This satellite image taken Saturday Sept. 26, 2009, provided by GeoEye shows a facility under construction inside a mountain located about 20 miles north northeast of Qom, Iran. Although there is no confirmation, analysts at both the Washington-based Institute for Science and International Security and London-based IHS Jane's believe this satellite photo of a site on a military base near Qom, Iran, is most likely the location of the newly revealed centrifuge facility. Analysts at both ISIS and Jane's point to apparent tunnel entrances leading into a mountain. (AP Photo/GeoEye Satellite Image, IHS Jane's Analysis)

This satellite image taken Saturday Sept. 26, 2009, provided by GeoEye shows a facility under construction inside a mountain located about 20 miles north northeast of Qom, Iran. Although there is no confirmation, analysts at both the Washington-based Institute for Science and International Security and London-based IHS Jane's believe this satellite photo of a site on a military base near Qom, Iran, is most likely the location of the newly revealed centrifuge facility. Analysts at both ISIS and Jane's point to apparent tunnel entrances leading into a mountain. (AP Photo/GeoEye Sateliite Image, IHS Jane's Analysis)

FILE - In this Sept. 26, 2009 file satellite image provided by GeoEye shows a facility under construction inside a mountain located about 20 miles (32 kilometers) north northeast of Qom, Iran. Iran has begun uranium enrichment at a new underground site well protected from possible airstrikes, a leading hardline newspaper reported Sunday, Jan. 8, 2011. (AP Photo/GeoEye Satellite Image, IHS Jane's Analysis, File)

FILE - In this Sept. 26, 2009 file satellite image provided by GeoEye shows a facility under construction inside a mountain located about 20 miles (32 kilometers) north northeast of Qom, Iran. Iran has begun uranium enrichment at a new underground site well protected from possible airstrikes, a leading hardline newspaper reported Sunday, Jan. 8, 2011. (AP Photo/GeoEye Satellite Image, IHS Jane's Analysis, File)