"I am continuing for 1 year the national emergency previously declared on September 14, 2001, in response to certain terrorist attacks," Trump said in a notice published by the White House.
Trump underscored that the terrorist threat to the United States has not been eliminated, and therefore the powers adopted to deal with it must remain in effect.
The fourth airplane crashed in Shanksville, Pennsylvania after the passengers tried to take back control of the plane from the hijackers.
Nearly 3,000 people were killed and another 6,000 were injured in the attacks.
*Al-Qaeda is a militant Sunni Islamist multi-national terrorist group banned in Russia