An accomplished mechanic, who loved working on his car, as well as play guitar, PFC Langhorn was drafted into the U.S. Army shortly after he graduated from Riverhead High School in 1967.
PFC Langhorn deployed to Vietnam as a radio operator with the 7th Squadron, 17th Cavalry Regiment, 1st Aviation Brigade.
On January 15, 1969, his unit was attempting to rescue the crew of a downed helicopter when they came under attack. In defense of his squadmates, PFC Langhorn threw himself upon a live grenade and was killed.
He rests in the Riverhead Cemetery, in Riverhead, New York.
In his honor, the Pulaski Elementary School holds an annual "Garfield Langhorn Essay Contest" and the Riverhead Post Office also bears his name.