You can find and expnd more information about the Terrorist Travel Prevencion Act (The Act)
What is the Visa Waiver Program Improvement and Terrorist Travel Prevention Act of 2015? Why is it necessary to once again expand the amount of ESTA information being collected from VWP travelers?
On December 18, 2015, the Visa Waiver Program Improvement and Terrorist Travel Prevention Act of 2015 (the Act) became law as part of the Consolidated Appropriations Act 2016. The Act, among other things, established new eligibility requirements for travel under the VWP. These new eligibility requirements do not bar travel to the United States. Instead, a traveler who does not meet the requirements must obtain a visa for travel to the United States, which generally includes an in-person interview at a U.S. Embassy or Consulate.
DHS has updated the ESTA application with additional questions to address the new eligibility requirements under the Act.