The events and anniversaries: Report: 1915 - World War I: Italy declares war on Austria-Hungary. Civil Aviation: 1930 - Amy Johnson lands with her aircraft in Darwin, Northern Territory, becoming the first woman to fly from England to Australia (she left on May 5 for the 11,000 mile flight). Helicopters: 1940 - Igor Sikorsky performs the first successful single-rotor helicopter flight. Report:...