After the Sept. 11, 2001, terrorist attacks, heart-wrenching images surfaced and stirred the world.
Photos released by the US National Archives in 2016 show exactly when President George W. Bush learned the US was under attack.
See how Bush responded to what would be the defining moment of his presidency.
After addressing the nation, Bush meets with his National Security Council in the President’s Emergency Operations Center.
This article originally appeared on Business Insider. Follow @BusinessInsider on Twitter.