Harkey Dai, "You can usually revalidate an expired visa automatically when returning from a visit of less than thirty days to Canada, Mexico" What does "automatic visa revalidation" means? Does it mean that my expired visa will be renewed and a new visa will be issued? Or my visa will still be expired but I would only be able to re-enter US with the same expired visa. What if the US Embassies in those countries did not issue me new visa if I applied for new visa, will I have to return back to Nepal? What's the probability of getting new visa from those countries, If you know.. also is it better to renew visa in Nepal or from some other third countries. Thank you for your time.