Editing 1973 (section)

===December===
{{main|December 1973}}
* December – [[Chile]] breaks [[Chile–Sweden relations|diplomatic contacts]] with [[Sweden]].
* [[December 1]] – [[Papua New Guinea]] gains self-government from Australia.
* [[December 3]] – [[Pioneer program]]: ''[[Pioneer 10]]'' sends back the first close-up images of [[Jupiter]].
* [[December 6]] – The [[United States House of Representatives]] votes 387–35 to confirm [[Gerald Ford]] as Vice President of the United States; he is sworn in the same day.
* [[December 14]] – [[Rhodesia]] executes two Blacks at Salisbury Central Prison for murder.<ref>{{Cite web |url=http://www.truecrimelibrary.com/crime_series_show.php?series_number=13&id=1049 |title=Execution By Hanging: 14/12/1973 Hatiduduzi Guvamantanga And Rivers Chimunondo – Zimbabwe (Rhodesia) |access-date=April 22, 2013 |archive-url=https://web.archive.org/web/20121213165412/http://www.truecrimelibrary.com/crime_series_show.php?id=1049&series_number=13 |archive-date=December 13, 2012 |url-status=dead}}</ref>
* [[December 18]]
** [[Soviet space program]]: [[Soyuz 13]] ([[Pyotr Klimuk]], [[Valentin Lebedev]]) is launched.
** The [[Islamic Development Bank]] is created as a specialized agency of the [[Organisation of Islamic Cooperation|Organisation of the Islamic Conference]] (OIC) (effective August 12, 1974).
* [[December 20]] – Spanish prime minister [[Luis Carrero-Blanco, 1st Duke of Carrero-Blanco|Luis Carrero Blanco]] is assassinated in [[Madrid]] by the separatist organization [[ETA (separatist group)|ETA]].
* [[December 28]] – The [[Endangered Species Act]] is passed in the United States.<ref>{{cite book |author=United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Resource Protection |title=Endangered Species Act Oversight: Hearings Before the Subcommittee on Resource Protection of the Committee on Environment and Public Works, United States Senate, Ninety-fifth Congress, First Session ... |url=https://books.google.com/books?id=S-7PAAAAMAAJ&pg=PA138 |year=1977 |publisher=U.S. Government Printing Office |pages=138}}</ref>
* [[December 30]] – Terrorist [[Ilich Ramírez Sánchez|Carlos]] fails in his attempt to assassinate British businessman Joseph Sieff.<ref>{{cite book |author=Shirelle Phelps |title=World of Criminal Justice |url=https://books.google.com/books?id=IzwvAQAAIAAJ |year=2002 |publisher=Gale Group |isbn=978-0-7876-5072-8 |page=113}}</ref>