On Sept. 11, 2001, hijackers flew planes into the World Trade Center and the Pentagon, killing thousands. Photos capture those marking the 25th anniversary of the attacks.
In pictures: The U.S. commemorates the 25th anniversary of 9/11
On Sept. 11, 2001, hijackers flew planes into the World Trade Center and the Pentagon, killing thousands. Photos capture those marking the 25th anniversary of the attacks.
