Dancer Josh Burnham plays the role of Colin Wolfe in the Manassas Ballet Theatre production Colin. Melanie Beus Photography hide caption

itoggle caption Melanie Beus Photography

A French military drone takes off in December 2010 from a U.S. airbase in Bagram, Afghanistan. Joel Saget/AFP/Getty Images hide caption

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A Malian troop member checks bushes after a military raid in the Wagoudou forest. Serge Daniel/AFP/Getty Images hide caption

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David Easterling, manager of the Suicide Prevention Program at Fort Riley in Kansas spray-paints Army boots white in 2009 as part of an on-base display to commemorate the six Fort Riley soldiers who committed suicide in 2008. Chris Hondros/Getty Images hide caption

itoggle caption Chris Hondros/Getty Images