31.07.1941 Maiden flight of Vega 37/Lockheed Ventura, developed from Lockheed Hudson/Lodestar family, was a mediocre bomber who find its way in the coastal command as maritime attacker and reconnaissance plane. Lockheed A-28/A-29 Hudson Lockheed PV/PV-2/B-34 Ventura/Harpoon
31.07.1944 Famous writer Antoine de Saint-Exupery MIA during combat sortie on Lockheed Lightning recce. Lockheed P-38 Lightning
31.07.1946 Sweden, Denmark and Norway founded SAS airline.
31.07.1952 The first transatlantic helicopter flight successfully finished. Two Sikorsky S-55 helicopters crossed Northern Atlantic from east to west in 8 days. Sikorsky S-55/H-19/HO4S Chickasaw/Whirlwind
31.07.1991 US senate allow to women pilots take part in aerial combats.
