More Terror Suspects Reaching the US: Here Are ‘Known Unknowns’ of the Border Crisis

U.S. Border Patrol agents cut an opening in razor wire at the U.S.-Mexico border early in Eagle Pass, Texas, on Sept. 29, 2023. John Moore/Getty Images

News Analysis

Hundreds of people on the FBI’s terrorist watchlist have almost certainly slipped into the United States amid millions of other illegal immigrants during the past three years, according to former federal officials and experts.