When Francis D’Urso of North Port. Fla. arrived in Korea in 1955 as a member of the 13th Helicopter Company based in Uijongbu, South Korea, approximately 80 miles north of Seoul and 30 miles south of the Demilitarized Zone, he was a 19-year-old specialist-3rd class crew chief on a 19-H “Chickasaw” Sikorsky-built helicopter.