Soon after the 9/11 attacks, the Library of Congress started to gather pictures, photographs, poems and other material for preservation.
On September 11, 2001, the twin towers of the NYC World Trade Center, and the Pentagon building were attacked by suicide hijackers on three planes. A fourth plane, headed for either the Capitol Building or the White House in D.C., crashed near in Pennsylvania after the passengers fought the hijackers. These tragic events led to the death of almost 3,000 people and injuries for more than 6,000 others, and created a permanent hinge point in the world's history. The official responsibility for these attacks is to the al-Qaeda terrorist organization, of which former senior members have asserted responsibility.