Airman 1st Class Christopher Lange, 22nd Aerospace Medicine Squadron bioenvironmental engineering apprentice, prepares to administer a fit test with the new M50 gas mask March 21, 2012, McConnell Air Force Base, Kan. Lange was named the spotlight performer of the week because of his outstanding contributions to his unit. (U.S. Air Force photo/ Airman 1st Class Laura L. Valentine)
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