U.S. Air Force Master Sgt. Timothy Middleton, 18th Operation Support Squadron air crew flight equipment heavy operations section chief, strikes a metal drum at an even tempo to help his teammates row in sync during a practice session in Naha City, Okinawa, Japan, April 12, 2014. Striking the drum at a tempo even the weakest rower can keep up with helps the team row in unison, causing the boat to travel faster. (U.S. Air Force photo by Airman 1st Class Zade C. Vadnais)
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