 After he had expended all of his explosives and blasting caps, Private First Class Phipps discovered a 175mm high explosive artillery round in a rice paddy.Suspecting that the enemy had attached at the artillery round to a secondary explosive device, he warned other Marines in the area to move to covered positions and prepared to destroy the round with a hand grenade.As he was attaching the hand grenade to a stake beside the artillery round, the fuse of the enemy's secondary explosive device ignited.