It’s only a 3 1/2 hour drive to the border from Boston, so they coud have been out of country by 6:30pm the same day.
I would lay odds that somewhere in the world, these guys are government-subsidized students.
Canada would be a logical place to start checking, they have a large muslim student population and would be out of the direct reach of US law enforcement.
Yep....they’re long gone.