Which have been the world's deadliest attacks since 9/11?
The world has witnessed several deadly terror attacks since the deadliest on September 11, 2001 which destroyed US' World Trade Center and killed nearly 3,000 people. An Al-Qaeda attack killed 400 people in 2007 in Iraq and 323 were killed in the country last year in an ISIS bombing. A terror attack in Somalia this year killed over 350 people.