March 29, 1973
Vietnam. The last American soldier leaves Vietnam. The game between Washington and Hanoi is officially over, according to the ceasefire schedule.
Vietnam. The last American soldier leaves Vietnam. The game between Washington and Hanoi is officially over, according to the ceasefire schedule.
ARPANET Project. Robert Kahn, a former BBN employee, and Vincent Cerf, who wrote the first RFC (Request for Comments) for the ARPANET, developed TCP-IP: Transmission Control Protocol – Internet Protocol. Cerf was present at the first use of the ARPANET in October 1969; he is
Vietnam. North Vietnam launches an offensive against the South.
Wernher von Braun announces his resignation from NASA, to join Fairchild, after 27 years of government service; he spent his last years with NASA in Washington only to see his plans to continue the Saturn V launches to the Moon and then to Mars dashed.
Launch of Venera 8, which transmits from the surface of Venus for 50 minutes. The launch vehicle is a Molnyia/R-7.
NASA decides to have two Solid Rocket Boosters (SRBs) for the Space Shuttle: brute force to reduce system costs compared to liquid-fuel systems
The economic crisis resulted in the devaluation of the dollar, which lost its convertibility into gold. The story, of course, has more complex facets: the French, among others, aspired to undermine the dollar’s dominance on world markets; during the Vietnam War, the Americans abused their
South Vietnamese forces begin incursions into Laos against the Ho Chi Minh Trail
The last launch of a Soviet satellite from the Zenit-4 program. These spy satellites were launched over a period of seven years. This is Kosmos-355 (to confuse matters and cover up military launches, 95% of Soviet launches are designated Kosmos…). Approximately 74 Zenit-4 satellite launches
6:50 PM ET: The Apollo command module splashed down softly in the Pacific Ocean; if they hadn’t succeeded, NASA had two more crews and two Saturn Vs ready to launch by the end of the decade, to fulfill President John Fritzgerald Kennedy’s promise.
18:42 02s Italian time: The Hornet helicopters sight the orange-white parachutes of the Apollo 11 mission CM a few kilometers from the established point, 940 nautical miles southwest of Honolulu, the Hornet is only 13 miles away from the CM
Robert Rathbu (Bob) Wilson asks Congress for $250 million in funding for the most ambitious particle accelerator project ever attempted at the time: the future FermiLab. Wilson is asked whether the project would be of any use to national security, but Wilson responds in the
In a meeting chaired by Deke Slayton, Bob Gilruth, George Low, Chris Kraft, it was decided that Neil Armstrong would be the first to land on the Moon.
Pacific Ocean, off the coast of Hawaii. An overheated missile explodes on the aircraft carrier USS Enterprise, igniting the kerosene and triggering further explosions, which crack the deck in several places and spread the burning kerosene to the lower deck. Twenty-eight people die and 15
North Vietnamese envoy Thieu to the Paris Peace Conference on the Vietnam conflict declares his intention to boycott it. The negotiations collapse.
United States. President Johnson announces that all American air, sea, and artillery operations in Vietnam will cease immediately to allow for peace negotiations. Two days later, North Vietnamese envoy Thieu, at the Paris Peace Conference, declares his intention to boycott it. The negotiations collapse.
The search for the nuclear submarine USS Scorpion, which tragically disappeared on May 22, 1968, along with 99 sailors aboard, is finally bearing fruit. The US Navy turned to John Cravem, a Navy Special Projects Officer, for the search. Cravem applies Bayesian statistical techniques. He
Apollo 7: Walter Schirra, Donn Eisele, and Walter Cunningham test the Command Module and Service Module in Earth orbit; the launch vehicle is a Saturn IB; they complete 163 orbits and are recovered by the aircraft carrier Essex; this is likely the key to the
Taiwan. Texas Instruments reached an agreement with the island’s government to build a new semiconductor factory in Taiwan. The first integrated circuits were released in August 1969. By 1980, it had produced a billion integrated circuits, flooding the world. Meanwhile, in 1973, Singapore also became
The Palestine Liberation Organization (PLO) hijacked an El Al airliner, Israel’s national airline, en route to Rome from Tel Aviv.
United States. President Johnson, contrary to Ike Eisenhower’s advice, decides that the possible use of tactical nuclear weapons in Vietnam should be considered only in the event of a massive and devastating Soviet intervention in the conflict.
Apollo V (SA204): Launch of an unmanned Saturn IB: the LM performs some maneuvers in orbit and then returns west of the coast of Panama. This is also the first test of the Apollo Guidance Computer and its program (named SUNBURST in this version, while
CORONA spy satellites (Mission 1101). First mission of the KH-4B (Key Hole 4B) type. Resolution improved to 2 m. The camera could also handle color film (at lower resolution and rarely used for this purpose, but useful for spotting camouflage techniques) and high-speed film. Many
DeWitt writes a study, inspired by Hugh Everett’s approach, on the Wheeler-DeWitt equation
Charles De Gaulle, beating Francois Mitterrand, is re-elected President of the French Republic
Pioneer 6 is launched to study the solar wind; in December 2000, after 35 years, it is successfully contacted by NASA.
Gemini 6 and 7 rendezvous in low Earth orbit: they approach to within 25 cm of each other; for the first time it is clear that the Americans have finally overtaken the Soviets in the space race.
Gemini 76: attempted launch of Gemini VI with Schirra and Stafford on board for rendezvous with Gemini VII already in orbit, but a few seconds before launch there is a launch-kill due to the umbilical cable that has detached prematurely
On the USS Ticonderoga, a group of sailors are pushing an A4-E Skyhawk aircraft onto the deck, 70 miles from Japan. When they’re finished pushing, they whistle to signal the pilot, aboard the plane, to apply the brakes. The pilot doesn’t hear; others yell “Brakes!
A second Soviet R-7 rocket is launched in the RD-108 configuration (in place of the less powerful RD-109 engine). It carries into orbit a Vostok modified to be a military spy satellite called Zenit-4.
The USSR launches three nuclear ICBMs to test their anti-missile capabilities.
The USSR detonates a 20.9 Mton nuclear device dropped from an aircraft
Nevada Range; Operation SunBeam, “Little Feller I” rocket detonation at 27m altitude, only 18 tons of TNT (0.018Kton) to test the Davy Crockett nuclear rocket launcher
16km south of Christmas Island, Operation Dominic; “Truckee” detonation at 2124m altitude, 210kton; prototype of the W-58 warhead to be mounted on Polaris A-2 missiles for nuclear submarines
Kennedy delivers a speech to the United Nations in which he states “Mankind must put an end to war – or war will put an end to mankind.”
The National Reconnaissance Office (NRO) is formed. This secret organization (made public in 1992) will use data collected by the CIA and the US Air Force, primarily via the CORONA spy satellites, to map Soviet nuclear and conventional power.
The Americans send a monkey into space on a Mercury-Redstone; it is called Ham and reaches an altitude of 253 km; an on-board television system is tested for the first time, which will be used extensively in the Apollo missions.
Eisenhower approved the SIOP (Single Integrated Operational Plan), which finally coordinated the strategic nuclear weapons objectives of the U.S. Army, U.S. Air Force, and U.S. Navy. It envisioned 3,729 targets, with over 1,000 ground zeros hit by 3,423 nuclear weapons. These were located in the
Earthquake in Chile: >9 Richter scale, 4000 dead Together with the 1964 Alaska earthquake it released 60% of the total energy released by all earthquakes this century
Joseph Carl Robnett Licklider publishes “Man-Computer Symbiosis.” “Lick” can be considered one of the fathers, or the father of, the Internet. Working for SAGE at Lincoln Laboratories (a military-funded institution affiliated with MIT), he developed concepts such as decentralized networks, time-sharing multitasking, and facilitated human-machine
China. With Mao’s Great Leap Forward, China was hit by one of the worst famines in history, resulting in the deaths of over 40 million people.
Jay Lathrop began working at Texas Instruments. With his assistant, James Nall, they had the brilliant idea of turning the microscope upside down, so that it reduced the image rather than enlarged it, thus projecting a smaller version of the circuit onto the germanium. They
Second Taiwan Crisis. The Chinese People’s Army begins another massive bombardment of the coastal islands disputed a few years earlier. After 15 days, the bombardment ceases, only to resume for another 29 consecutive days. Finally, the Chinese adopt the almost farcical system of bombing the
MJ Sparnaay observes the Casimir effect for the first time in a dedicated scientific experiment. Ten years earlier, Dutch physicist Henrik Casimir had demonstrated that quantum mechanics can create negative energy, discovering “virtual” particles that are continuously created and annihilated in an absolute vacuum.