US Marine Sergeant Sean T. Callahan, aged 23 from Warrenton, Virginia died 23rd April 2011 in Helmand province, Afghanistan when the his four-vehicle convoy was hit by a roadside bomb.
Sgt. Callahan was an anti-tank missile operator serving with the 3rd Battalion, 9th Marine Regiment. He had served two tours of duty in Iraq and deployed to Afghanistan in December 2010.
His awards include the Good Conduct Medal, National Defense Service Medal, Afghanistan Campaign Medal, Iraq Campaign Medal and Global War on Terrorism Service Medal.
In the same incident another Marine, Lance-Corporal Dominic Ciaramitaro lost his life.