In 1927, commercial transatlantic telephone service was inaugurated between New York and London.

In 1953, President Truman announced in his State of the Union message to Congress that the U.S. had developed a hydrogen bomb.

In 1963, the U.S. Post Office raised the cost of a first-class stamp from 4 to 5 cents.

In 1979, Vietnamese forces captured the Cambodian capital of Phnom Penh, overthrowing the Khmer Rouge government.

In 2004, President George W. Bush proposed legal status, at least temporarily, for millions of immigrants improperly working in the U.S.

In 2015, masked gunmen stormed the Paris offices of Charlie Hebdo, a French newspaper that had caricatured the Prophet Muhammad, methodically killing 12 people before escaping. (Two suspects were killed two days later.)