guys one of my fren came to encounter this prob. HE came in US in 05 with f1 status and then after being here for 9, 10 months he quit going to college just like that and now he is thinking about going to nepal. His question is what are the papers he needs to have when he crosses airport, like I-94, and I 20 and what else do i need to show them ? but he still has 4 years valid visa stamp. would there be any problem with such cases ?