Today is Wednesday, Dec. 11, the 345th day of 2013. There are 20 days left in the year. On Dec. 11, 1972, Apollo 17's lunar module landed on the moon with astronauts Eugene Cernan and Harrison Schmitt aboard; during three extravehicular activities (EVAs), they became the last two men to date to step onto the lunar surface. In 1792, France's King Louis XVI went before the Convention to face charges of treason. Louis was convicted, and executed the following month. In 1816, Indiana became the 19th state. In 1912, movie producer Carlo Ponti was born in Magenta, Italy. In 1928, police in Buenos Aires announced they had thwarted an attempt on the life of President-elect Herbert Hoover. In 1936, Britain's King Edward VIII abdicated the throne so he could marry American divorcee Wallis Warfield Simpson; his brother, Prince Albert, became King George VI. In 1937, Italy announced it was withdrawing from the League of Nations. In 1941, Germany and Italy declared war on the United States; the U.S. responded in kind. In 1946, the United Nations International Children's Emergency Fund (UNICEF) was established. In 1961, a U.S. aircraft carrier carrying Army helicopters arrived in Saigon - the first direct American military support for South Vietnam's battle against Communist guerrillas. In 1981, the El Mozote massacre in El Salvador claimed the lives of hundreds of civilians at the hands of army troops. The U.N. Security Council chose Javier Perez de Cuellar (hah-vee-EHR' PEHR'-ehs day KWAY'-yahr) of Peru to be the fifth secretary-general. Muhammad Ali, 39, fought his final fight, losing by unanimous decision to Trevor Berbick in Nassau, Bahamas. In 1997, more than 150 countries agreed at a global warming conference in Kyoto, Japan, to control the Earth's greenhouse gases. In 2008, Bernie Madoff was arrested, accused of running a multibillion-dollar Ponzi scheme. Madoff is serving a 150-year federal prison sentence. Ten years ago: U.S. health officials reported an early flu outbreak had hit all 50 states and was widespread in 24. A German court freed a Moroccan accused of supporting the Sept. 11 al-Qaida cell in Hamburg, saying there was new evidence he did not know about the plot. A new second home for the National Air and Space Museum opened in Chantilly, Va., some 28 miles west of the original's home in Washington, D.C. Five years ago: Former Nasdaq chairman Bernie Madoff was arrested, accused of running a multibillion-dollar Ponzi scheme that destroyed thousands of people's life savings and wrecked charities. The remains of missing Florida toddler Caylee Anthony were found six months after she disappeared. Her mother, Casey Anthony, was acquitted of murder in her daughter's death. A suicide bomber killed at least 55 people near Kirkuk, Iraq. Former Teamsters Union president Ron Carey died in New York at age 72. Former pinup model Bettie Page died in Los Angeles at age 85.