Two US army soldiers from Company C, 1st Battalion, 52nd Aviation Regiment, MEDEVAC team fall as they carry a wounded colleague (C) through a flooded field to a US Army Blackhawk helicopter in Kandahar province in southern Afghanistan on March 28, 2011.(AFP PHOTO/Peter PARKS)

US army soldiers from Company C, 1st Battalion, 52nd Aviation Regiment, MEDEVAC team carry a wounded colleague (C) through a flooded field to a US Army Blackhawk helicopter in Kandahar province in southern Afghanistan on March 28, 2011. (AFP PHOTO/Peter PARKS)

The expression on this soldier’s face as he looks back at his wounded friend really struck a nerve with me.

A US army soldier from Company C, 1st Battalion, 52nd Aviation Regiment, MEDEVAC team (C) looks back at his wounded colleaque as he lies inside a US army Blackhawk helicopter in Kandahar province in southern Afghanistan on March 28, 2011. (AFP PHOTO/Peter PARKS)