Senior US officials have outlined the biometric checks being used on potential refugees from the Syrian conflict, stating that these are ensuring that no terrorism suspects are being allowed into the country.On arrival all available biographical and biometric information of refugees is vetted against a broad array of law enforcement, intelligence community, and other relevant databases to help confirm a refugee's identity, said Simon Henshaw, Principal Deputy Assistant Secretary, Bureau of Population, Refugees, and Migration.”Biometric checks are coordinated by USCIS [United States Citizenship and Immigration Services (USCIS) ]using mobile fingerprint equipment and photographs at the time of the interview. These fingerprints are screened against the vast biometric holdings of the FBI, the integrated automatic – automated fingerprint identification system, and screened and enrolled in DHS's Automated Biometric Identification System, which is known as IDENT.”Henshaw added that through IDENT, applicant fingerprints are screened not only against watch list information, but also for previous immigration encounters in the United States and overseas, including cases in which the applicant previously applied for a visa at a US embassy.The classified details of the refugee screening security screen process are also regularly shared with relevant congressional committees.The United Nations on Friday appealed to the US to admit Syrian refugees cleared by security checks. However, Congress and many governors say Islamic State terrorists will try to slip into the country posing as innocents.Meanwhile, also on Thursday, Senate Democrats proposed that only biometric passport holders be allowed to enter the country.Sen. Dianne Feinstein, D-Calif., is drafting legislation to require in-person interviews at a U.S. embassy and that all travellers from those so-called visa-waiver countries would be required to have passports with biometric information such as fingerprints.Sen. Maria Cantwell, D-Wash also wants to check a traveller's background against watch lists using the biometric identification before the traveller arrives in the US, reports USA Today.”If they are making up new identifies, we have to have the ability with good technology to track that and track them in their travels,” she said. “We want the facial recognition and fingerprint scans to happen. And we want the data information to be shared by all countries, so that we know where people have been traveling.”