And the people on OPT (Optional Practical Training) have F "student" visas, which required them to prove that they needed to get education in the US in order to

And the people on OPT (Optional Practical Training) have F "student" visas, which required them to prove that they needed to get education in the US in order to use it in their home country and have no intention on staying in the US after finishing the education least "building a life" there. Supported by evidence of strong ties to the home country, stated under penalty of perjury.