Environment

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Camden, Maine, has become a popular destination for retirees despite its cooler climate as many retirees stray from moving to Arizona or Florida. The picturesque harbor town has more people in their 60s than in their 20s and 30s combined. (Associated Press)

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Fereidoun Abbasi-Davani, Iran's nuclear chief, delivers a speech on Monday, Sept. 17, 2012, at the general conference of the International Atomic Energy Agency at the International Center in Vienna, Austria. (Associated Press)

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The Soyuz TMA-04M spacecraft lands with Expedition 32 Commander Gennady Padalka of Russia, NASA Flight Engineer Joe Acaba and Russian Flight Engineer Sergie Revin in a remote area near Arkalyk, Kazakhstan, on Monday, Sept. 17, 2012. (AP Photo/NASA, Carla Cioffi)

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A visitor looks out over the Chesapeake Bay, with the Bay Bridge in the background, at Sandy Point State Park in Annapolis. The Environmental Protection Agency helps fund the Bay Journal, a publication of the Alliance for the Chesapeake Bay. (Associated Press)

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Czech Republic's Tomas Berdych returns the ball to Argentina's Carlos Berlocq during the Davis Cup semifinals tennis match in Buenos Aires, Argentina on Sunday, Sept. 16, 2012. (AP Photo/Eduardo Di Baia)

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A police officer directs traffic outside the stadium at the Cheong Shim Peace World Center in Gapyeong, Korea on Saturday, Sept. 15, 2012, where hundreds of busloads of mourners arrived for the Seonghwa, or ascension, ceremony, known as the traditional funeral in western terms, for the late Rev. Sun Myung Moon. (Barbara L. Salisbury/The Washington Times)

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Roger Bernadina was OK after slamming into the left field wall at Turner Field Friday night making a catch. (Associated Press)

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Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns in the rain at Lake Erie College in Painesville, Ohio, Friday, Sept. 14, 2012. (AP Photo/Charles Dharapak)

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Volcanic ash spews from the Volcan de Fuego (left), or Volcano of Fire, as seen from Palin, south of Guatemala City, on Sept. 13, 2012. The long-simmering volcano exploded into a series of powerful eruptions, hurling thick clouds of ash nearly two miles high, spewing rivers of lava down its flanks and forcing the evacuation of more than 33,000 people from surrounding communities. (Associated Press)