IE 11 is not supported. For an optimal experience visit our site on another browser.

15 Years Later: Tell NBC #WhereWereYou911

NBC News is asking you to share where you were on that day on Twitter using the hashtag #WhereWereYou911.
Image: FILE September 11 Attack Orchestrator Osama Bin Laden Dead
People walk away from the area where the World Trade Center buildings collapsed after two airplanes slammed into the twin towers in a suspected terrorist attack September 11, 2001 in New York City. U.S. President Barack Obama announced the death of Osama Bin Laden during a late evening statement to the press May 1, 2011 in the East Room of the White House. Bin Laden has reportedly been killed near Islamabad, Pakistan, almost a decade after the terrorist attacks of September 11, 2001 and his body is in possession of the United States.Mario Tama / Getty Images

Where were you on September 11, 2001? It's a question most people know the answer to—instantly. Across the country, lives were affected by the horrific coordinated terror attacks of the day from New York City to Washington, D.C. and Shanksville, Pennsylvania.

NBC News is asking you to share on Twitter where you were on 9/11 using the hashtag #WhereWereYou911. We're collecting responses from across the U.S. and beyond and posting them.