September 11, 2001
September 11, 2001 Memorial collage Hilary North, Memorial collage/mat board of a survivor’s efforts to find finds, 2001. New-York Historical Society, Gift of Hilary North, 2003.72. On the morning of September 11, 2001, four commercial US airplanes were hijacked in flight. The 19 hijackers, later identified as members of the terrorist group al Qaeda, were on a suicide mission. They flew two of the planes into the twin towers of the World Trade Center in New York City, just as people were starting their work day. The north tower was hit at 8:46 a.m. The second plane hit the south tower at 9:03 a.m. At 9:37 a.m., the third plane hit the Pentagon, headquarters of the US Department of Defense, located just outside Washington, DC. At