November 3 – The UNIX Programmer's Manual is published. November 6 – Operation Grommet: The U.S. tests a thermonuclear warhead at Amchitka Island in Alaska, code-named Project Cannikin. At around 5 megatons, it is the largest ever U.S. underground detonation. November 8 – Led Zeppelin release their fourth studio album Led Zeppelin IV, which goes on to sell 23,000,000 copies in the United States. November 9 – A Royal Air Force C-130 crashes into the Ligurian Sea near Leghorn, Italy, killing all 51 people on board. November 10 – In Cambodia, Khmer Rouge forces attack Phnom Penh and its airport, killing 44, wounding at least 30 and damaging 9 airplanes. November 11 – The English rock band Pink Floyd releases its sixth studio album, Meddle. November 12 – Vietnam War – Vietnamization: U.S. President Richard M. Nixon sets February 1, 1972, as the deadline for the removal of another 45,000 American troops from Vietnam. November 13 – Mariner program: Mariner 9 becomes the first spacecraft to enter Mars orbit successfully. November 14 – Pope Shenouda III of Alexandria is enthroned. November 15 Intel releases the world's first microprocessor, the Intel 4004. International Organization and System of Space Communications (Intersputnik) is founded (effective July 12, 1972). November 18 – Oman gains independence from the United Kingdom. November 20 – A bridge still under construction, called Elevado Engenheiro Freyssinet, falls over the Paulo de Frontin Avenue, in Rio de Janeiro, Brazil; 48 people are killed and several injured. Reconstructed, the bridge is a part of the Linha Vermelha elevate. November 22 – In Britain's worst mountaineering tragedy, the Cairngorm Plateau disaster, five children and one of their leaders are found dead from exposure in the Scottish mountains. November 23 – The People's Republic of China takes the Republic of China's seat on the United Nations Security Council (see China and the United Nations). November 24 During a severe storm over Washington State, a man calling himself D. B. Cooper parachutes from the Northwest Orient Airlines plane he had hijacked, with US$200,000 in ransom money, and is never seen again (as of November 2022, this case remains the only unsolved skyjacking in history). A Brussels court sentences pretender Alexis Brimeyer to 18 months in jail for falsely using a noble title; Brimeyer has already fled to Greece. November 28 – The 59th Grey Cup Game sees the Calgary Stampeders beat the Toronto Argonauts