Sgt. Mark Dean – one of Medal of Honor recipient Cpl. Jason Dunham's close friends – and Capt. Trent Gibson, Dunham's former company commander, sort out the pieces of the Kevlar helmet Dunham used to help absorb the blast of a grenade in the streets of Iraq in 2004. (Photo by Pfc. Michael T. Gams)

Sgt. Mark Dean – one of Medal of Honor recipient Cpl. Jason Dunham’s close friends – and Capt. Trent Gibson, Dunham’s former company commander, sort out the pieces of the Kevlar helmet Dunham used to help absorb the blast of a grenade in the streets of Iraq in 2004. (Photo by Pfc. Michael T. Gams)