The name “Euro” was officially adopted for European Currency.
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The US State Department increased the reward for information on the Islamic State leader Abu Bakr al-Baghdadi to $25 million.
German armies took Allied forces by surprise in the Ardennes, marking the beginning of the Battle of the Bulge.
O.J. Simpson became the first NFL running back to rush for 2,000 yards in a season.
Mariah Carey's single 'All I Want for Christmas Is You' reached number one, 25 years after its release.
The mayor of Flint, Michigan, declared a state of emergency over contaminated water.
