(CNN) Some Afghans fleeing their home country have arrived in the United States without paperwork amid the rapid pace of evacuations , according to two sources familiar with the situation, prompting additional screening and causing long delays. "Some people have landed with no documents whatsoever, creating a very challenging work environment for the officers," the source added. Even with missing paperwork, Customs and Border Protection has ways to identify people, but given the rush of evacuations, the source familiar said, "it's just a math game. A former US counterterrorism official compared the vetting effort to previous emergency screenings of refugees from Syria and Iraq. Intelligence and law enforcement officials are always fearful of missing something in their vetting and that a terrorist could slip through.

Source: CNN August 25, 2021 23:37 UTC