16 of 56: In this 2012 photo provided by the Cronkite News, the Granite Mountain Hotshot crew clears a fire line through the forest. On Sunday, June 30, 2013, 19 members of the Prescott, Ariz.-based crew were killed in the deadliest wildfire involving firefighters in the U.S. for at least 30 years. The firefighters were forced to deploy their emergency fire shelters - tent-like structures meant to shield firefighters from flames and heat - when they were caught near the central Arizona town of Yarnell, according to a state forestry spokesman. (AP Photo/Cronkite News, Connor Radnovich) (AP Photo/ Connor Radnovich)

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