Today is Patriot Day. On September 11, 2001, four planes were hijacked. The hijackers then flew three of the planes into three buildings, the Twin Towers of the World Trade Center in New York and the Pentagon in Washington DC. The fourth crashed into a field near Shanksville, Pennsylvania. Nearly 3000 people died in the attacks.

By a joint resolution approved on December 18, 2001, the U.S. Congress has designated September 11 of each year as "Patriot Day," and on April 21, 2009, it has requested the observance of September 11 as an annually recognized "National Day of Service and Remembrance."