A Phantom flight crew comprised of 1LT John H. Nasmyth, Jr., pilot, and 1LT Raymond P. Salzarulo, Jr., Bombardier/Navigator, was dispatched on a mission over North Vietnam on September 4, 1966. As the aircraft was over Bac Thai Province, about 10 miles southwest of the city of Thai Nguyen, it was shot down. 1LT Nasmyth was captured by the Vietnamese and spent the next six and a half years as a "guest" in prison systems in and around Hanoi. He was released in February 1973 in Operation Homecoming. The Vietnamese told Nasmyth that his backseater was dead, and his body had been in the crashed aircraft. Yet, since September 1966, the Vietnamese have denied any knowledge of the fate of Ray Salzarulo.
His body was returned to the United States in 1990.