Captain John Christopher was a male Human military officer in the 20th century. He served in the Air Defense Command, a command in the United States Air Force. He had qualified as an expert pilot in this command. His serial (service) number was 4857932. As of 1969, he was a husband and the father of two daughters. After 1969, he was the father of Shaun Geoffrey Christopher, the commander of the first successful mission to Saturn. At some point in his career, he was in line for the space program but failed to qualify. In 1968, he served at the Air Force base of the US 498th Airbase Group.