** Ernst Heinkel, German aircraft designer ( d. 1958 )

** Twelve German Heinkel He 111 bombers attack Convoy RA-53 during its voyage from Murmansk in the Soviet Union to Loch Ewe, Scotland, but cause no damage.

** Techniques: genetic screen — paternity test — linkage map — genetic map

** The Insulet OmniPod has a separate remote, also known as a Personal Diabetes Monitor ( PDM ), that features a built-in meter that uses Freestyle test strips.

** Enhanced self test features like the L1 cache parity check ( see Cache Structure in the Developers Manual, Vol 1 ).

** Likelihood-ratio test

** an experimental nationally assessed test for tracking progresses in reading comprehension, language knowledge, reasoning skills and basic mathematical skills

** a third test prepared by each examining board based on the programmes of all the subjects of the last year of study

** Test IDN TLDs were installed under < tt > test </ tt > for testing purposes in the IDN development process.

** Space Shuttle program: Last test taxi flight of Space Shuttle Enterprise.

** TCP / IP test succeeds connecting 3 ARPANET nodes ( of 111 ), in what eventually becomes the Internet protocol.

** Gemini 1 is launched, the first unmanned test of the 2-man spacecraft.

** Halifax Explosion: Two freighters collide in Halifax Harbour at Halifax, Nova Scotia and cause a huge explosion that kills at least 1, 963 people, injures 9, 000 and destroys part of the city ( until the Trinity nuclear test, the biggest manmade explosion in recorded history ).

** Swaminarayan wrote the Shikshapatri, an important test within the Swaminarayan faith.

** China performs a nuclear test, ending a worldwide de facto moratorium.

** In Toulouse, France the first Concorde test flight is conducted.

** Apollo program: NASA launches Apollo 9 ( James McDivitt, David Scott, Rusty Schweickart ) to test the lunar module.

** Apollo program: Apollo 10 returns to Earth, after a successful 8-day test of all the components needed for the upcoming first manned Moon landing.

** Boone Guyton, American test pilot ( d. 1996 )

** A possible experimental atomic test blast occurs at the Nazis ' Ohrdruf military testing area.

** Howard Hughes nearly dies in a test flight of the Hughes XF-11 and crashes it in a suburban Beverly Hills neighborhood because of a propeller malfunction.

** Nuclear testing: In the first underwater test of the atomic bomb, the surplus USS Saratoga is sunk near Bikini Atoll in the Pacific Ocean, when the United States detonates the Baker device during Operation Crossroads.

** Boone Guyton, American test pilot ( b. 1913 )

** A second nuclear test, codenamed Chagai-II, is conducted and supervised by the Pakistan Atomic Energy Commission ( PAEC ).

** The nuclear test ban treaty, signed on August 5, takes effect.

** Nuclear test: Under Project Smiling Buddha, India successfully detonates its first nuclear weapon, becoming the 6th nation to do so.

** db4o shipped to first pilot customer

** Pacific Air Lines Flight 773 crashes near San Ramon, California, killing all 44 aboard ; the FBI later reports that a cockpit recorder tape indicates that the pilot and co-pilot had been shot by a suicidal passenger.

** Mohamed Atta, Egyptian pilot and airplane hijacker ( b. 1968 )

** Ziad Jarrah, Lebanese pilot and airplane hijacker 93 ( b. 1975 )

** Frank Linke-Crawford, Austro-Hungarian fighter pilot ( b. 1893 )

** Roland Garros, French fighter pilot ( b. 1888 )

** Iraq disarmament crisis: Iraqi military escorts on board an UNSCOM helicopter try to physically prevent the UNSCOM pilot from flying the helicopter in the direction of its planned destination, threatening the safety of the aircraft and their crews.

** Three armed men hijack the Cathay Pacific passenger plane Miss Macao and shoot the pilot ; the plane crashes, killing 26 of 27 people on board.

** Werner Moelders, German fighter pilot ( d. 1941 )

** Endel Puusepp, Soviet Estonian World War II pilot ( b. 1909 )

** Elly Beinhorn, German pilot ( d. 2007 )

** Cold War: Soviet Air Force pilot Lt. Viktor Belenko lands a MiG-25 jet fighter at Hakodate, on the island of Hokkaidō in Japan, and requests political asylum in the United States.

** A chartered plane transporting musicians Buddy Holly, Ritchie Valens, and The Big Bopper and pilot Roger Peterson goes down in foggy conditions near Clear Lake, Iowa, killing all 4 occupants on board.

** Roger Peterson, pilot ( b. 1937 )

** The trial of the American U-2 pilot Francis Gary Powers begins in Moscow.

** Cold War: In Moscow, the American U-2 pilot Francis Gary Powers is sentenced to 10 years in prison for espionage.

** The U. S. Navy's Commander Leroy Heath ( the pilot ) and Lieutenant Larry Monroe ( the bombardier / navigator ) establish a world flight-altitude record of 91, 450 feet ( 27, 874 m ), with payload, in an A-5 Vigilante twinjet bomber carrying a 1, 000 kilogram payload, and they better the previous world record by over four miles ( 6 km ).

** Milburn G. Apt, American test pilot ( b. 1924 )

** Hans-Ulrich Rudel, German pilot ( d. 1982 )

** Fraser Barron, New Zealand bomber pilot during WWII ( died 1944 )

** U. S. Navy pilot John McCain is shot down over North Vietnam and made a POW.

** Test pilot Michael Adams is killed when his X-15 rocket plane tumbles out of control during atmospheric re-entry and disintegrates.