#OnThisDay (2011): Terrorist Osama bin Laden, mastermind of the September 11 attacks and leader of the al-Qaeda terror network, is killed in Pakistan by U.S. forces. | History in Five

On the morning of September 11, a 24-year-old man working inside the World Trade Center made a final phone call to his mother as the building began to collapse around him. Thursday marks 24 years since the Sept. 11, 2001 terror attacks, when al Qaeda hijackers crashed four passenger jets into the World Trade Center, the Pentagon and a field in Shanksville, Pennsylvania. Every year, the city and nation pause to remember the 2,983 people killed in the 2001 attacks and in the 1993 World Trade Cente

Eyewitness News reporter N.J. Burkett and photographer Marty Glembotzky rushed down to the World Trade Center on September 11, 2001. While shooting a standup right below the burning towers, the first tower began to collapse. | ABC7NY