September 21st

2013
The Westgate Mall is attacked in Nairobi, Kenya. In a daring siege, militants of the extremist group al-Shabaab took over the Mall. 63 shoppers were killed during the attack that lasted a few hours, and before the Kenyan security forces rescued the hostages, 4 terrorists were also killed. Al-Shabaab declared that it had undertaken the attack as retaliation for the presence of Kenyan armed forces in Somalia.
Westgate shopping mall attack
2008
Mad Men became the first basic-cable show to win a top series Emmy award.
Mad Men
2004
The album "American Idiot" by Green Day was released.
American Idiot
2001
Congress approved $15 billion to help an airline industry reeling from the Sept. 11 terrorist attacks.
Pan American World Airways
1998
President Bill Clinton's videotaped grand jury testimony in the Monica Lewinsky scandal was publicly broadcast, showing him answering one question from prosecutors by saying, 'It depends on what the meaning of 'is' is.'.
Impeachment of Bill Clinton
1996
The board of Virginia Military Institute voted to admit women.
United States v. Virginia
1983
Interior Secretary James G. Watt described a special advisory panel as consisting of 'a black .. a woman, two Jews and a cripple.' Watt later apologized and resigned.
James G. Watt
1982
National Football League players began a 57-day strike.
1982 NFL season
1981
Belize gained its independence from Great Britain.
History of Belize
1970
'NFL Monday Night Football' debuted on ABC.
History of Monday Night Football
1964
Malta gains its independence from the UK. The southern European island country came under British control in 1814 as part of the Treaty of Paris. The country initially retained the Queen of England as its head of state but declared itself a republic on December 13, 1974.
Malta
1961
Boeing CH-47 Chinook takes flight for the first time. The American-made helicopter has been used by the US military in a variety of conflict-related operations including during the recent wars in Afghanistan and Iraq. It has also been often used for medical evacuation and search and rescue operations during natural disasters around the world.
Boeing CH-47 Chinook
1957
'Perry Mason,' starring Raymond Burr, premiered on CBS.
Perry Mason (TV series)
1954
1st nuclear submarine, USS Nautilus, commissioned under Commander Eugene P. Wilkinson.
Eugene Parks Wilkinson
1949
Chinese Communist leaders proclaim People's Republic of China.
History of the People's Republic of China
1948
Milton Berle debuted as permanent host of 'The Texaco Star Theater' on NBC.
Texaco Star Theatre
1942
Boeing B-29 Superfortress flies for the first time. The bomber was used extensively by the US in World War II and the Korean War. The two planes – Enola Gay and Bockscar – that dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki were from the silverplate series of Boeing B-29s.
Boeing B-29 Superfortress
1938
A hurricane struck parts of New York and New England, causing widespread damage and claiming more than 600 lives.
1938 New England hurricane
1937
JRR Tolkien's The Hobbit is published for the first time. The Hobbit, or There and Back Again is a young adult fantasy novel that follows the adventures of the hobbit Bilbo Baggins as he traverses through Middle Earth to find treasure guarded by a dragon named Smaug.
The Hobbit
1931
Britain went off the gold standard.
Gold standard
1922
US President Warren G. Harding signs a joint resolution of approval to establish a Jewish homeland in Palestine.
Warren G. Harding
1898
Empress Dowager Cixi seizes power and ends the Hundred Days' Reform in China, imprisoning the Guangxu Emperor.
Hundred Days' Reform
1897
The New York Sun ran an editorial answering a question from an 8-year-old girl that included the line, 'Yes, Virginia, there is a Santa Claus.'.
Nellie Bly
1792
The French National Convention voted to abolish the monarchy.
Kingdom of France (1791–92)
1621
King James I of England gives Sir Alexander Sterling royal charter for colonisation of Nova Scotia.
William Alexander, 1st Earl of Stirling