The Peebles operation, with more than 250 employees and located on nearly 7,000 acres, is both an engine test and final assembly facility. Each year, Peebles runs final acceptance testing on about 1,250 engines manufactured by GE and its joint venture partners. From Peebles, these engines are shipped to aircraft manufacturers for installation on customer aircraft. Does Hangar 18, Legendary Alien Warehouse, Exist? Crashed UFOs, alien autopsies and government cover-ups — untangling the legend surrounding Ohio’s Wright-Patterson Air Force Base. As home to Project Blue Book, ground zero for government investigation of UFOs from 1951 to 1969, Wright Field (now Wright-Patterson Air Force Base) outside Dayton, Ohio, ranks up there alongside Area 51 as a subject of enduring speculation.