WHAT HAPPENED ON 4. APRIL
Want to find out what all happened on 4. April

Microsoft is founded as a partnership between Bill Gates and Paul Allen in Albuquerque, New Mexico (4. April 1975)

Vietnam War: Operation Baby Lift – A United States Air Force Lockheed C-5A Galaxy transporting orphans, crashes near Saigon, South Vietnam shortly after takeoff; 172 die. (4. April 1975)

Prince Norodom Sihanouk resigns as leader of Cambodia and is placed under house arrest. (4. April 1976)

President Zulfikar Ali Bhutto of Pakistan is executed. (4. April 1979)

The Islamic Republic of Iran Air Force mounts an attack on H-3 Airbase and destroys about 50 Iraqi aircraft. (4. April 1981)

Space Shuttle Challenger makes its maiden voyage into space (STS-6). (4. April 1983)

President Ronald Reagan calls for an international ban on chemical weapons. (4. April 1984)

Governor Evan Mecham of Arizona is convicted in his impeachment trial and removed from office. (4. April 1988)

Senator John Heinz of Pennsylvania and six others are killed when a helicopter collides with their airplane over an elementary school in Merion, Pennsylvania. (4. April 1991)

The current flag of Hong Kong is adopted for post-colonial Hong Kong during the Third Session of the Seventh National People's Congress . (4. April 1991)

Marc Andreessen and Jim Clark found Netscape Communications Corporation under the name "Mosaic Communications Corporation". (4. April 1994)

Comet Hyakutake is imaged by the USA Asteroid Orbiter Near Earth Asteroid Rendezvous. (4. April 1996)

The Angolan government and UNITA rebels sign a peace treaty ending the Angolan Civil War. (4. April 2002)

15 British Royal Navy personnel held in Iran are released by the Iranian President. (4. April 2007)

More than 70 people are killed in a building collapse in Thane, India. (4. April 2013)