U.S. soldier tears up during Christmas Eve celebrations

A U.S. soldier from the Nato-led International Security Assistance Force (ISAF) tears up during Christmas Eve celebrations in Kabul on December 24, 2012. (Omar Sobhani/Reuters)

A U.S. soldier from the Nato-led International Security Assistance Force (ISAF) tears up during Christmas Eve celebrations in Kabul on December 24, 2012. (Omar Sobhani/Reuters)