Program Note: Tune in tonight for Gary Tuchman's full report on James Arthur Ray's self-help program. AC360° at 10 p.m. ET.

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In 2007 and 2008, CNN took viewers around the world with Planet in Peril. This worldwide investigation looked at four key issues: climate change, vanishing habitats, disappearing species and human population growth. Anderson Cooper, Dr. Sanjay Gupta and Animal Planet's Jeff Corwin traveled to some of the most remote and remarkable places on Earth and gathered evidence on the unsettling changes taking place all around us.
Go here to view some incredible images captured through out this journey.

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"Planet in Peril: Battle Lines" traveled around the world to document threats to the environment.

Tim Hetherington
Getty Images for CNN
October was the deadliest month for U.S. forces in Afghanistan since the beginning of the war in 2001. Roadside bombs are now the biggest threat to U.S. forces in the region. In September, Anderson reported from the front lines of the war against the Taliban and went out on patrol with Marines in Helmand Province.
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