Clement Foster Lajeunesse, the son of Clement and Agnes (Demere) Lajeunesse, was born on November 28, 1936, in Schenectady, New York. He attended St. Joseph’s Academy. 

In 1954, Clement enlisted in the United States Marine Corps. He trained in electronics in Memphis, Tennessee, and Jacksonville, Florida. He held the rank of Gunnery Sergeant and served with the HMM 262, 1st MAW, Marine Aircraft Group 39, 3rd Marine Amphibious Force. Clement was killed when the helicopter he was riding in, which had been carrying out a medical evacuation operation, crashed into the water east of Quang Tri Province, on August 31, 1967. Clement is buried at the Long Island National Cemetery, Long Island, New York.

Clement and Michael Laymon were on the same helicopter.

Sources: The Schenectady Gazette, Find A Grave, Ancestry