Environment

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Ben S. Bernanke said the European debt crisis is the biggest danger for the U.S. economy. (Associated Press)

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Ray Easterling, shown being helped from the field during an Atlanta Falcons game in 1978, shot himself in his Richmond home in April. He was 62. (Associated Press)

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New Greek Prime Minister Antonis Samaras waves after being sworn in on Wednesday, June 20, 2012, in Athens. (AP Photo/Petros Karadjias)

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A Palestinian inspects the debris of a destroyed motorcycle on June 18, 2012, after an Israeli airstrike in Beit Hanoun, northern Gaza Strip. (Associated Press)

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**FILE** An irrigation pivot remains along a highway several miles near the proposed new route for the Keystone XL pipeline in Neligh, Neb. (Associated Press)

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The headquarters for the Washington Metro Area Transit Authority is shown here in this undated file photo.

In this image made off the screen at the Beijing Aerospace Control Center and released by China's Xinhua News Agency, China's Shenzhou-9 manned spacecraft (left) docks with the Tiangong-1 space lab module shortly after 2 p.m. Beijing time (2 a.m. EDT) on Monday, June 18, 2012, 213 miles above Earth. (AP Photo/Beijing Aerospace Control Center via Xinhua)

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A National Guardsman stops a motorist from driving down Highway 14 north of Laporte, Colo., on Thursday, June 17, 2012, as a stubborn wildfire burns in northern Colorado. (Associated Press)

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Chinese astronauts Jing Haipeng (center), Liu Wang (left) and Liu Yang sit inside the capsule after the launch of China's manned Shenzhou-9 spacecraft on Saturday, June 16, 2012. Shenzhou-9 blasted off from the Jiuquan Satellite Launch Center in northwestern China. (Associated Press)