Khalid Sheikh Mohammed, the alleged mastermind of the 9/11 terror attacks of 2001, has agreed to a plea deal that would see him avoid the death penalty in lieu of a life sentence, according to reports citing US prosecutors.

Who is Khalid Sheikh Mohammed, the alleged mastermind of 9/11 attacks who'll avoid death penalty?

In pics | From New York to Alaska: US marks 22 years since 9/11 attacks

On September 11, 2001, two planes were flown into the famous twin towers of the World Trade Center in New York City. 19 terrorists associated with the Islamic extremist group al-Qaeda hijacked four airplanes and carried out suicide attacks against targets in the United States. The third plane hit the Pentagon just outside Washington, DC, and the fourth plane crashed in a field in Pennsylvania. Over 3,000 people were killed during the 9/11 terrorist attacks. The 9/11 attack triggered major US initiatives to combat terrorism.

What happened on September 11, 2001? | 9/11 attacks

US to mark 18th anniversary of the September 11 attacks

The family of an Afghan man detained and allegedly tortured to death by the Central Intelligence Agency in the wake of the 9/11 attacks sued Friday to find out what happened to his body.

Afghan family sues CIA to find body of post-9/11 detainee

By reacting with the doctrine and invading Iraq in 2003, the US committed a series of missteps that indirectly helped foment jihadism

'Shock and awe' response to 9/11 helped jihad's spread: Analysts