Ingenpedia:OnThisDay/January 7, 2021

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 * 1797 – The first official Italian tricolour was adopted by the government of the Cispadane Republic.
 * 1904 – The Marconi International Marine Communication Company mandated that CQD be the distress signal use by its operators, although this was replaced by SOS a few years later.
 * 1939 – The French physicist Marguerite Perey identified francium, the last element first discovered in nature, rather than by synthesis.
 * 1948 – Air National Guard pilot Thomas Mantell, flying in pursuit of an alleged UFO, was killed when his P-51 Mustang crashed near Fort Knox, Kentucky.
 * 1978 – An article titled "Iran and Red and Black Colonization" was published in the newspaper Ettela'at to attack Ruhollah Khomeini, described as an Indian Sayyed.
 * 1979 – The People's Army of Vietnam captured Phnom Penh, which marked the end of large-scale fighting in the Cambodian–Vietnamese War.
 * 1989 – Representatives of Ruhollah Khomeini delivered a letter to Mikhail Gorbachev, inviting him to consider Islam as an alternative to communism, and predicting the dissolution of the Soviet Bloc.
 * 1993 – The Fourth Republic of Ghana was inaugurated with Jerry Rawlings, the former military ruler of the country, as its president.
 * 2012 – A hot air balloon flight from Carterton, New Zealand, collided with a power line while landing, causing it to catch fire, disintegrate and crash, killing all eleven people on board.
 * Born/died this day: Johann Heinrich Zedler (b. 1706)· Joseph Dennie (d. 1812)· Eliezer Ben-Yehuda (b. 1858)· Li Shengjiao (b. 1935)· Helena Válková (b. 1951)· Zara Cisco Brough (d. 1988)· Run Run Shaw (d. 2014)