This legislation amends Section 236A of the Immigration and Nationality Act to enhance national security screenings at the border. It specifically adds a provision stating that an alien is subject to custody if they are identified on the federal terrorist screening database. Furthermore, the bill mandates that the Commissioner of U.S. Customs and Border Protection (CBP) must take and maintain custody of any alien until their name has been successfully cross-referenced with the terrorist screening database and a result from this check is received. This requirement applies notwithstanding any other provision of law , ensuring that this screening process is prioritized. The legislation also defines "terrorist screening database" by referencing the Homeland Security Act of 2002.