A U.S. Marine of the First Division carries a mascot for good luck in his backpack as his unit pushed further into the western part of Fallujah, Iraq, on Nov. 14, 2004.

A Canadian soldier with the 1st RCR Battle Group chases a chicken seconds before he and his unit were attacked by grenades during a patrol in Salavat, southwest of Kandahar, Afghanistan on Sept. 11, 2010.

A truck en route to Kandahar, Afghanistan, drives past people at a store in Quetta, Pakistan, on Feb. 8, 2011. Fuel for NATO troops in southern Afghanistan is transported along dangerous routes by impoverished Pakistani drivers.

A Libyan rebel, draped in the old Libyan flag, prays at the entrance to the city of Ajdabiya, south of Benghazi, eastern Libya, March 26, 2011.

Lance Cpl. Blas Trevino of the First Battalion, 5th Marines, clinches onto his rosary beads as he is rescued onto a helicopter in southern Afghanistan on June 11, 2011.

A German soldier lifts weights at his combat outpost in Char Darah, outisde Kunduz, Afghanistan, Sept. 17, 2011.

A Pakistani man prepares balloons for Valentines Day on a street in Islamabad, Pakistan, on Feb. 14, 2012.

A Pakistani Army soldier with the 20th Lancers Armored Regiment stands atop a 8,000-foot mountain during a patrol near his outpost, Kalpani Base, in Pakistan's Dir province on Feb. 17, 2012.

An Afghan man watches his pigeons after feeding them in Kabul, Afghanistan, March 8, 2012.

An Afghan National policeman seen through a windscreen of an armored vehicle shattered by a single bullet in Lashkar Gah, Helmand Province, Afghanistan, on Oct. 18, 2012.

Pakistani children peek under a curtain that hides the residence inside a home of a poor neighborhood in Mingora, in the Swat Valley, Pakistan, on Nov 14, 2012 -- one month after a Taliban gunman shot Malala Yousufzai in the Swat Valley.

An Afghan woman peers through the eye slit of her burqa as she waits to try on a new burqa in a shop in Kabul, Afghanistan on April 11, 2013. Despite advances in women’s rights, Afghanistan remains a deeply conservative country and most women continue to wear the burqa.

Pakistani policemen leave a Christian community after angry Christians protested the beating of a young man belonging to the Joseph Colony in Lahore, Pakistan, on April 30, 2013.

Afghan Army soldiers gather at a military training facility in the outskirts of Kabul, Afghanistan, on May 8, 2013.

An Afghan boy flies his kite on a hill overlooking Kabul, Afghanistan, on May 13, 2013. Banned during the Taliban regime, kite flying is once again the main recreational escape for Afghan boys and some men.

An Afghan National police officer mans a checkpoint in the outskirts of Maidan Shahr in the Wardak province of Afghanistan on May 15, 2013.

An Afghan honor of guard stands next to pictures of late Afghan Vice President Field Marshal Mohammed Qasim outside his house in Kabul, Afghanistan, on March 10, 2014.

A picture of Afghan President Hamid Karzai hangs on a wall in the main room of the district municipality in eastern Kabul on March 29, 2014.

Afghan women with a child line up to get their registration cards on the last day of voter registration for the upcoming presidential elections outside a school in Kabul, Afghanistan, on April 1, 2014.

An Afghan soldier, left, and a policeman peek through a window as they line up to get their registration cards on the last day of voter registration for the upcoming presidential elections outside a school in Kabul, Afghanistan, on April 1, 2014.