At least they brought no pressure cookers. And probably no cr*pweasels.
You got off easy.
Testing. Dry run. Now they know that there are eyes so next time they'll have to recruit a driver. Or they were the distraction from the real mission. If they'd been named Billy Joe or Bubba, their names and mug shots would be all over MSNBC this morning. What's the status of their student visas? If they've recently graduated, will their visas expire before their court date giving them an excuse to leave?