Changes

* '''October [[World War II]] occurs during this year, and lasts from September 1''' – First flight , [[1939]] – September 2, [[1945]].    * A test [[pilot]] becomes the first person to escape from a stricken aircraft with an ejection seat. * [[Table of Elements#P|Plutonium]] is isolated for the Bell XP-59 "Aircomet"first time, at the [[United States Branches of AmericaScientific Study#M|USAMetallurgical]]'s first jet fighter aircraftLaboratory of the University of Chicago. * '''October 3''' – The first successful launch of a V-2 /A4-rocket from Test Stand VII at Peenemünde, [[Germany]]occurs. :* It is flies 147 km (91 mi) and reaches an altitude of 84.5 km (52.5 mi), becoming the first man-made object to reach [[space]]. * The "Manhattan Project": The first self-sustaining nuclear chain reaction is initiated.:* This "Project" was a research and development undertaking that produced the first [[Nuclear Fission|nuclear weapons]].