The President of the United States of America, authorized by Act of Congress, July 9, 1918 (amended by act of July 25, 1963), takes pleasure in presenting the Distinguished Service Cross to Warrant Officer One (WO-1) Jack E. Grimmer (ASN: W-3154024), United States Army, for extraordinary heroism in connection with military operations involving conflict with an armed hostile force in the Republic of Vietnam, while serving with 336th Assault Helicopter Company, 13th Combat Aviation Battalion, 1st Aviation Brigade. Warrant Officer Grimmer distinguished himself by exceptionally valorous actions on 15 February 1967 while flying a helicopter during the airlift of Vietnamese troops into an unsecured landing zone near Vi Thanh. As the flight of troop ships started to land, it came under intense hostile fire which crippled Warrant Officer Grimmer’s aircraft. Exiting the helicopter, he noticed that the lead ship had also crashed and was only fifty meters from the Viet Cong positions. After directing his men to safety, he fearlessly ran and crawled through a hail of bullets and exploding mortar rounds to extract the surviving crew members from the wreckage. As they moved back, one of the men was seriously wounded in both legs. Unmindful of the extreme dangers, Warrant Officer Grimmer helped carry the stricken man to cover behind a low dike and administered first aid to him. He then dauntlessly began to engage the enemy with all available weapons, including a machine gun he retrieved from a dead Vietnamese soldier. Moving throughout the ravaged area to coordinate the defense, Warrant Officer Grimmer continued to provide accurate suppressive fire, allowing a relief force to land. Once the insurgent positions had been practically silenced, he again returned to the lead aircraft to put out a fire and removed the dead pilot from the wreckage. After being evacuated to the staging field, Warrant Officer Grimmer volunteered to fly a perilous mission back into the landing zone. During the remainder of the afternoon and into the night, he repeatedly flew through hostile sniper and mortar fire, until all the downed helicopters were properly rigged for recovery. His unimpeachable valor and composure were instrumental in preventing further death or injury to his comrades, and insured the immediate salvage of valuable equipment. Warrant Officer Grimmer’s extraordinary heroism and devotion to duty were in keeping with the highest traditions of the military service and reflect great credit upon himself, his unit, and the United States Army.