<Tr> <Td> Seychelles </Td> <Td> 0 </Td> <Td> multiple </Td> <Td> 10 years </Td> <Td> </Td> </Tr> <Tr> <Td> Sierra Leone </Td> <Td> 0 </Td> <Td> multiple </Td> <Td> 3 years </Td> <Td> </Td> </Tr> <Tr> <Td> Singapore </Td> <Td> 0 </Td> <Td> multiple </Td> <Td> 10 years </Td> <Td> May also enter by land without a visa, or by air or sea with ESTA . </Td> </Tr> <Tr> <Td> Slovakia </Td> <Td> 0 </Td> <Td> multiple </Td> <Td> 10 years </Td> <Td> May also enter by land without a visa, or by air or sea with ESTA . </Td> </Tr>

B2 visa maximum stay 6 months or 180 days