When it exploded, the grenade shredded his helmet and mortally wounded the 22-year-old Dunham. What did Cpl Dunham use to cover the grenade?ĭunham threw himself on top of it, covering the grenade with his kevlar helmet and his body. Dunham succumbed to his wounds eight days later, and later became the first Marine to receive the Medal of Honor since Vietnam. Jason Dunham saved the lives of his fellow Marines when he jumped on top of an enemy grenade and shielded them from the blast.