One of the few remaining Boeing-built B-17Gs, N3702G has been on display at the Castle Air Museum since 1979 and was one of the first ex-air tankers to be traded back into the USAF Heritage Program. TBM Inc. of Tulare, California, was its last civil operator, though TBM traded it to Aero Union of Chico, California, before it went to the USAF. It is marked as Virgin's Delight and is shown here in 2007. (Josh Kaiser) close