Last users of the Norden bombsight were probably US Navy Squadron VO-67, for interdiction on the Ho Chi Minh trail during the Vietnam War. They found suitable

Last users of the Norden bombsight were probably US Navy Squadron VO-67, for interdiction on the Ho Chi Minh trail during the Vietnam War. They found suitable equipment in storage but had to track-down retired technicians to make it work. http://www.tailsthroughtime.com/2015/12/navy-observation-squadron-sixty-seven.html http://www.tailsthroughtime.com/2015/12/navy-observation-squ... "A training film on the use of the Norden was found at the Smithsonian Institution and was sent to VO-67."