September 11 widow Marcela Leahy and New York Rangers legend Mark Messier reflect on the impact an organization named "Answer the Call" has made on victims' families.

In September 2006, he confessed his responsibility for the attacks. "I was responsible for the 9/11 operation, from A to Z," he had said. He is yet to be tried and convicted for the heinous crime.

Families of September 11, the organization she co-founded, started as a Yahoo listserv. After meeting with the mayor, John Cartier, who’d lost his brother James, collected family members ...

The September 11 attacks on the Twin towers shocked the world (Pictures: Robert Giroux/Getty Images) The 9/11 attacks in New York and Washington DC shocked the world, with the ramifications still ...

Now, it is the law to do so in New York public schools. Craig Ruttle/AP On Monday, just two days before the 18th anniversary of 9/11, Cuomo established the "September 11th Remembrance Day." ...

September 11 has been a solemn day in the US for the last 22 years. In 2009, Congress formally recognized the day as an annual “National Day of Service and Remembrance.” ...

9/11 Heroes Run at Houston City Hall -- The 9/11 Heroes Run unites communities internationally with the goal to never forget the sacrifices of the heroes of September 11th and the wars since ...

Those words were repeated in millions of homes on Sept. 11, 2001. Friends and relatives took to the telephone: Something awful was happening. You have to see. Before social media and with online ...

Alexandria 9/11 Remembrance Ceremony: The City of Alexandria invites the public to attend a remembrance ceremony Sunday, September 11, from 10 to 11 a.m., at City Hall Market Square.

On September 11, Mike Morell was a CIA analyst responsible for delivering the president’s daily intelligence brief. He would later serve twice as acting director of the CIA.

US President Barack Obama stands at the Pentagon in Washington, DC, September 11, 2014, for a moment of silence marking the 13th anniversary of the 9/11 attacks on the United States.