National Security Agencies Screen Applicant.
The National Security Agencies includes National counterterrorism center, U.S. Department of Homeland Security and department of Justice.
National Scurity will check the past immigration violations, criminal violations, connections to"bad actors" , double-check background information.
Homeland Scurity will review the screening results after National Security check the information. It takes more steps: In-person interview, fingerprints collected, fingerprints run through databases. They makes the final decision on the national scurity.