A lawyer for the families of 9/11 victims said conclusions "validate arguments we have made in litigation regarding the Saudi government’s responsibility."
The former president, who was in office the day terrorists hijacked a series of planes, denounced both strains of violent ideology.
Police shot and killed a man who stabbed and wounded six people in a supermarket.
13 American troops and dozens of Afghan civilians were killed in a suicide bomb attack Thursday at Kabul airport.
Weeks before the 20th anniversary of 9/11, ex-President Donald Trump said the terrorist behind the 2001 attacks wasn't as bad as the "monsters" he took out.
The president spoke about the multiple explosions attributed to ISIS that have left at least a dozen U.S. troops and 60 Afghans dead, with more wounded.
"No one who serves in Congress should be expressing public sympathy with the views of a terrorist," a colleague admonished the Alabama Republican.
Washington Metropolitan Police Officer Daniel Hodges said he "came prepared" with the definition.
“They beat police officers with Blue Lives Matter flags," said Officer Harry Dunn. "They fought us. They had Confederate flags in the U.S. Capitol."
A number of other groups, including the far-right Atomwaffen Division, have also been designated as terror organizations.