Patriot Day is an annual observance on September 11 to remember those who were injured or died during the terrorist attacks in the United States on September 11, 2001. Many Americans refer to Patriot Day as 9/11 or September 11.
On September 11, 2001, four planes were hijacked. The hijackers then deliberately flew three of the planes into two important buildings, the Pentagon in Washington DC and the Twin Towers of the World Trade Center in New York. The fourth crashed into a field near Shanksville, Pennsylvania. The loss of life and damage that these hijackings caused form the biggest act of terrorism ever on United States soil. Nearly 3000 people died in the attacks and the economic impact was immense.
The attacks have greatly increased attention to national security in the United States. This has had huge implications for United States national and international politics. This is particularly true for the relationships between the United States and Islamic countries in the Middle East.
On the direction of the President, the flag of the United States of America should be displayed on the homes of Americans, the White House and all United States government buildings in the whole world. The flag should be flown at half-staff as a mark of respect to those who died on September 11, 2001. Many people observe a moment of silence at 8:46 AM (Eastern Daylight Time). This marks the time that the first plane flew into the World Trade Center. Some communities, particularly in the areas directly affected by the attacks, hold special church services or prayer meetings. People who personally experienced the events in 2001 or lost loved ones in them, may lay flowers or visit memorials.