If you are going just for 2 weeks, you are cutting it really close. Fill out the necessary application form and drop off your passport at the U.S. embassy as soon as you Kathmandu. For more accurate information, e-mail the U.S. embassy in Nepal from the U.S. They will get back to you in about 24 hrs. The consulate e-mail address is in the embassy website. Just google it. Good Luck! K'dude!