I got some highlights over the S.2454.. S. 2454, the Securing America's Borders Act Student Visas S. 2454 would extend foreign students’ post-curricular Optional Practical Training (and F-1 status) to 24 months, and create a new “F-4” student visa for students pursuing an advanced degree in the fields of math, engineering, technology or the physical sciences. Legislative History On March 16, 2006, Senator Frist introduced S. 2454, the Securing America’s Borders Act. On March 28, 2005 a cloture motion on the motion to proceed on S.2454 was withdrawn by unanimous consent in Senate.