Abstract Harley R. Schneider was an employee of Northwest Airlines Corp. Schneider was a civil engineer employed to modify World War II bombers at Northwest Airlines Corp. Modification Center in St. Paul, Minnesota. Northwest Airlines expanded their facilities in 1943 which included a new Modification Center in Vandalia, Ohio. Schneider was reassigned to the Vandalia location in 1943. This collection consists of various materials from his time working at the Vandalia Modification Center including a...