Here are 10 terrorist attacks against the United States in the 21st century prior to Oct. 7th:

2009 Fort Hood Shooting: Nidal Hasan, a U.S. Army major, killed 13 and injured 30 in a shooting spree, inspired by extremist ideologies.

2013 Boston Marathon Bombing: Two bombs exploded near the finish line, killing 3 people and injuring over 260. The attack was carried out by the Tsarnaev brothers.

2015 San Bernardino Shooting: A married couple inspired by extremist groups killed 14 people and injured 22 at a holiday party.

2016 Orlando Nightclub Shooting: Omar Mateen killed 49 and injured 53 at Pulse, a gay nightclub, in a terrorist act claimed by ISIS.

2001 Anthrax Attacks: Letters containing anthrax spores were sent to media offices and U.S. senators, killing 5 people and infecting 17.

2010 Times Square Bomb Attempt: A failed car bombing in Times Square, orchestrated by Faisal Shahzad, a Pakistani-American inspired by terrorist groups.

2019 Pensacola Naval Air Station Shooting: A Saudi Air Force officer killed 3 and injured 8 in a shooting inspired by Al-Qaeda.

2002 D.C. Sniper Attacks: John Allen Muhammad and Lee Boyd Malvo terrorized the D.C. area, killing 10 people, with potential ideological motives.

2006 UNC Vehicle Attack: Mohammed Taheri-azar drove into a crowd at the University of North Carolina, citing jihadist motivations.

September 11, 2001: Al-Qaeda hijacked four planes, crashing them into the World Trade Center, the Pentagon, and a field in Pennsylvania, killing nearly 3,000 people.