Exactly how many "student" visas are issued annually to those from Islamic States? How many actually go to their stated destinations (thinking of the covey of missing Egyptians who never made it to Bozeman, Montana, but who were not, the FBI assured us long before that little dustup in Britain, "terrorist" suspects) and how many actually meet the terms of their visa and go home? A corollary: how many are missing and unaccounted for right now in the United States?
And while you're at it, Judge Michael, stop entertaining the media's fascination with some connection between the would-be aircraft bombers and Al Qaeda. It makes no difference what other affiliations an Islamic Jihadist happens to have and so long as Osama has king's X in Pafganistan it never will.