This has been the modus operandi of the Palestinians also. They have come in on student visas, supposedly to study English. They register, attend a few classes, then drop out of site. They are free to move about the country from safe house to safe house. And, some of the schools they are coming in to supposedly attend are small junior colleges and small colleges (e.g., KHALID SHAIKH MOHAMMED).
and thanks for noticing my little keyboard slip there