There is an extensive al-Qaeda network feeding global branches based in the Islamic Republic.
The al-Qaeda assault, where 2,996 people died, remains the worst on US soil since Pearl Harbour in 1941.
Document has remained secret since its completion, despite repeated calls for it to be made public.
Swat team and dog units deployed after 'suspicious person' spotted in building's garage.
Study launched to investigate how victims have memorised the Islamic State terror attacks of November 2015.
The Guantanamo Bay prison was set up after 9/11 and has become a symbol of the US's war on terror.
Redacted 28 pages of 9/11 Commission report expected to be published in June.
Saudi Arabia apparently threatened to withdraw US investments if the bill was passed.
If US imperialism is root of terrorism, where are the South American suicide bombers?
Ubisoft's game, set in New York City following a terrorist attack, has clear parallels.
With our political climate, we need a movement that unites us instead of dividing us due to ignorant rhetoric.
New York City Hall will also appoint an independent observer to oversee the NYPD.
With the world in solidarity after Paris attacks we can't ignore the 200 daily victims of Syrian conflict.
Time-lapse map charts every major terrorist attack since 2000.
Former vice president conducted his own foreign policy during George W Bush's reign, claims 41st US president.
Formerly known as detainee 239, Shaker Aamer could receive around £1m in compensation from the British government.
Former UK prime minister argues that views of extremists echoed in wider Muslim communities.
Former prime minister warned Islamic extremist ideology has support from Muslims worldwide.
Judge rules that Saudi Arabia is protected by sovereign immunity.
Cybersecurity expert John McAfee claims next airline hijacking will be undertaken by hackers.
Over last 14 years the comedian repeatedly told story of coming close to death in Twin Tower attacks
American musician and his wife host 9/11 theme wedding with twin towers cake.