What agency is responsible for the protection of US borders from security threats?
Over the past five years, there have been a number of changes in this area, responding to changing world conditions. As of March 1, 2003, the Department of Homeland Security (DHS) took the role as enforcer of the Immigration and Nationality Act, including provisions on admissibility, for the purpose of protecting the US from terrorist attacks, coordinating responses to national emergencies, and securing the borders and transportation systems. Still, the Department of State (DOS) has a crucial role in determining who is admissible. What are the grounds for inadmissibility related to security? US immigration law makes a variety of security related concerns grounds for inadmissibility. If a Department of State consular officer or USCIS inspector either knows or has a reasonable basis for believing that the person is currently or will in the future engage in terrorist activities, if the person has incited terrorist activity, or if the person is a representative or member of a terrorist org