On Sept. 11, 2001, terrorist attacks on America altered the world's political and military landscape. How much do you really know about the history of these atrocities?
Question 1 of 20
Who was the operational mastermind of the 9/11 attacks?
Question 2 of 20
Khalid Sheikh Mohammed's plan originally called for crashing how many planes?
Question 3 of 20
After the South Tower of the World Trade Center was hit, how long did it remain standing before finally collapsing?
Question 4 of 20
Why did al-Qaida select only cross-country flights for their plan?
Question 5 of 20
How many total hijackers took part in the 9/11 attacks?
Question 6 of 20
How many people died at the World Trade Center as a result of the attacks?
Question 7 of 20
Although the country had few links to al-Qaida and no connection to 9/11, American leaders used supposed evidence of what to invade Iraq?
Question 8 of 20
On the morning on Sept. 11, 2001, at what time did the FAA order every plane in American airspace to land?
Question 9 of 20
On which of the four hijacked planes did passengers fight back against the terrorists?
Question 10 of 20
Near which city did Flight 93 crash?
Question 11 of 20
Minus the hijackers, how many passengers were aboard Flight 93?
Question 12 of 20
What was the intended target of Flight 93 before passengers interrupted the hijackers' plans?
Question 13 of 20
After the attacks, how much time passed before America launched a full-scale war against terrorism?
Question 14 of 20
Before they attacked the terrorists, what did passengers aboard Flight 93 do?
Question 15 of 20
What was the primary weapon of the hijackers?
Question 16 of 20
How long did it take for Osama bin Laden to admit his part in the 9/11 attacks?
Question 17 of 20
The CIA finally found bid Laden in 2011. How long did they track his courier before pinpointing bin Laden's location?
Question 18 of 20
How many gallons/liters of jet fuel was Flight 93 carrying as it crashed?
Question 19 of 20
What's the name of the Pakistani town where bin Laden was killed by U.S. forces?
Question 20 of 20