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Subscribe to RSSNext time you're annoyed with your fellow gym mates, who are taking too long on your favorite machine or leaving their sweat all over it, think -- it could be worse.
Paula Bronstein / Getty Images
Sgt. Jay Kenney, 26, with the 101st Airborne Division, Task Force Destiny, uses tires as makeshift weights in order to workout inside the recreation center on a quiet day waiting for an air mission at Forward Operating Base Ramrod December 10, 2010 in Kandahar province, Afghanistan.