Border officials say there is no evidence that ISIS militants are entering the U.S. via Mexico despite evidence that the possibility is being discussed on social media accounts related to ISIS. They say that radicalized militants returning to the U.S. remain a greater threat. Department of Homeland Security official Jennifer Lasley tells the House Homeland Security border security subcommittee:
We don’t have any credible information, that we are aware of, of known or suspected terrorists coming across the border.
John Wagner, assistant commissioner in the U.S. Customs and Border Patrol’s Office of Field Operation:
The number of known watch-listed persons we are encountering on the Southwest border is minimal compared to commercial aviation. We’re talking tens versus thousands.