Final Approach


Lt. Col. Jeff Klosky, a 99th Expeditionary Reconnaissance Squadron U-2 mission pilot, receives 100 percent oxygen an hour before his flight April 19, 2014, at an undisclosed location in Southwest Asia. U-2 pilots receive the oxygen for approximately an hour to remove nitrogen and other gases from the body to prevent decompression sickness. (U.S. Air Force photo byTech. Sgt. Russ Scalf/Released)

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