 In the aftermath of the September 11 attacks (September 11, 2001) and the Patriot Act passed in response (October 26, 2001), there was further increase in scrutiny of student visas, increasing the momentum in favor of the adoption of SEVIS.This was partly because of the fact that one of the attackers, Hani Hanjour, had come to the United States on a student visa.Below is a timeline of the key events in the two years after the attacks describing the key steps in the evolution of SEVIS