The caption says they're waiting for an air strike, and yet they appear relaxed, more like they're waiting for pizza delivery. I suppose any opportunity to rest in that situation is welcome.

David Furst/AFP - Getty Images
US soldiers from Ghostrider Company 3rd Squadron 2nd Stryker Cavalry Regiment take a rest as they wait for an air-strike they ordered to arrive while hunting for caves and tunnels used by insurgents in Diyala Province, northeast of Baghdad, on March 23, 2008.