<Tr> <Td> Sudan outside Khartoum </Td> <Td> Travel permit required </Td> <Td> </Td> <Td> All foreigners traveling more than 25 kilometers outside of Khartoum must obtain a travel permit . </Td> </Tr> <Tr> <Td> Sudan Darfur </Td> <Td> Travel permit required </Td> <Td> </Td> <Td> Separate travel permit is required . </Td> </Tr> <Tr> <Th_colspan="4"> Asia </Th> </Tr> <Tr> <Th> Visitor to </Th> <Th> Visa requirement </Th> <Th> Allowed stay </Th> <Th> Notes (excluding departure fees) </Th> </Tr>

Who needs a passport to enter the united states