 When he had come to within 6 feet of one of the enemy bunkers and was preparing to toss a hand grenade into it, an enemy grenade was suddenly thrown into the middle of his small group.Thinking only of his men, 1st Lt. Warren fell in the direction of the grenade, thus shielding those around him from the blast.His action, performed at the cost of his life, saved 3 men from serious or mortal injury.