Sgt. Maj. of the Marine Corps John. L. Estrada listens during the ceremony posthumously inducting U.S. Marine Corps Cpl. Jason L. Dunham into the Pentagon Hall of Heroes, Jan. 12, 2007. Dunham was critically injured in Iraq when he jumped on a grenade to save the lives of others. Sgt. Maj. of the Marine Corps John. L. Estrada listens during the ceremony posthumously inducting U.S. Marine Corps Cpl. Jason L. Dunham into the Pentagon Hall of Heroes, Jan. 12, 2007. Dunham was critically injured in Iraq when he jumped on a grenade to save the lives of others. SHARE: Download: Full Size (2.48 MB) Tags: Photo Essays Credit: VIRIN: 525429-O-DCG82-677.jpg Photo Gallery