The Junkers Ju 52 aircraft "Kaleva" by the Finnish airline Aero is parked at Helsinki's Malmi Airport in this 1939 photo. With U.S. and French diplomatic couriers aboard, the civilian plane was shot down over the Baltic Sea by Soviet bombers on June 14, 1940 just days before Moscow annexed the three Baltic states. The mysterious case which claimed the lives of nine people is being solved after 84 years as an Estonian diving group has located the aircraft's wreckage off a tiny island close to Tallinn. (Finnish Aviation Museum via AP)