Firefighter prepares to navigate entrapment obstacle
A firefighter prepares to navigate a simulated roof collapse during a training exercise, Wednesday, July 12, 2017, Niagara Falls Air Reserve Station, Niagara Falls, N.Y. The week-long training teaches participants fire ground survival techniques to be used in emergency situations. (U.S. Air Force photo by Staff Sgt. Richard Mekkri)

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Photo by: Staff Sgt. Richard Mekkri |  VIRIN: 170713-F-RJ808-102.JPG