A police vehicle's headlights are seen as people are silhouetted in the fading light as the moon peers through the trees during unseasonal hot weather on Hampstead Heath in London, Saturday, Oct. 1, 2011. Britain experienced the hottest October day on record Saturday, with the national weather service the Met Office saying the temperature reached 85.8 F (29.9 C) at Gravesend in southeast England. That is the highest October temperature since records began a century ago, beating the previous high of 84.9 F (29.4 C) reached on Oct. 4, 1985. (AP Photo/Matt Dunham)

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