20mm target practice tracer (TPT) rounds from Marine Light Attack Helicopter Squadron (HMLA) 469, Marine Aircraft Group 39, 3rd Marine Aircraft Wing during a deployment for training at Mountain Home Air Force Base in Mountain Home, Idaho on March 13, 2014. 20mm TPT rounds are inert projectiles with tracer material in the base for visual trajectory tracking.
Cpl. Tyler Gregory
Taken on 13 March 2014
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