Advanced Aviation Threat Identification Program The existence of a U.S. government program that investigated reports of UFOs is revealed.
Politics of South Africa Thousands of delegates of the African National Congress gather in Johannesburg to elect a party leader, who may replace President Jacob Zuma before his term expires in 2019.
Politics of Australia The Coalition keep a one-seat majority in the Australian House of Representatives after the Liberals win the Bennelong by-election.
Chilean Five people are killed and at least 15 missing in a mudslide in Villa Santa Lucía, a remote village in southern Chile, after more than 4.5 inches (11.4 cm) of rain the previous 24 hours. President Michelle Bachelet declares a state of emergency. Sunday is the run-off election for Chile's next president.
Honduras Six people are killed, including Hilda Hernández, sister of Honduran President Juan Orlando Hernández, in a helicopter accident that was headed to Comayagua from Toncontín International Airport in Tegucigalpa.
December 2017 Southern California wildfires More evacuations are ordered as surging Santa Ana winds drive the 40-percent contained Thomas Fire, now the third-largest in California history, further westward in Santa Barbara County.
China–United Kingdom relations The BBC reports that former Prime Minister of the United Kingdom David Cameron is to head a £750 million ($1 billion) U.K. private fund to improve air, road and railway links between China and its trading partners.