Nine-O-Nine was a Boeing B-17G-30-BO Flying Fortress heavy bomber, of the 323d Bombardment Squadron, 91st Bombardment Group, that completed 140 combat missions during World War II, believed to be the Eighth Air Force record for most missions, without loss to the crews that flew her. A different B-17G, painted to mimic the Nine-O-Nine, crashed at Bradley International Airport in Windsor Locks, Connecticut, in October 2019.