[OldDog]

Their first point of a refugee's contact is with the U.N. High Commission for Refugees. The UNHCR refers people to countries based on whether they have any family members there and where resettlement makes the most sense, say U.S. officials. If that's the U.S., then refugees are vetted by the National Counterterrorism Center, the FBI's Terrorist Screening Center, and the Departments of State, Defense and Homeland Security. Fingerprints are taken, biographical information is collected. They are then each individually interviewed by U.S. officials trained to verify that they're bona fide refugees.
http://www.npr.org/2015/11/17/456395...refugee-policy

That was then. This is now:

But it’s hard to imagine how questions about gender roles or terrorist leanings would help prevent dangerous people from entering the U.S., said one former immigration official.

“If someone really was coming here to do us harm, do we really believe they would answer that question honestly?” said Doris Meissner, a senior fellow at the Migration Policy Institute and commissioner of the Immigration and Naturalization Service under former President Bill Clinton.
http://www.latimes.com/politics/la-n...htmlstory.html