Locals Did It

The mass killing in Orlando this weekend fits a grim pattern: Every lethal terrorist attack in the United States in the past decade and a half has been carried out by American citizens or legal permanent residents, operating either as lone wolves or in pairs, who have no formal connections or training from terrorist organizations such as al Qaeda or ISIS.

Because 9/11 was carried out by 19 Arab foreign-born terrorists, many Americans may think that terrorist attacks in the United States are carried out by foreigners, rather than by U.S. citizens.

But Omar Mateen, who on Sunday carried out the deadliest terrorist attack in the United States since 9/11, is an American citizen who was born in New York to parents who immigrated to the United States from Afghanistan.

—Peter Bergen, CNN