As long as you have a US visa with you, you can also enter Mexico.
On an ESTA visa waiver, you can stay in the US for up to 90 days per visit.
A B1/B2 visa allows you to stay in the US for a maximum of 6 months per visit.
A B1 visa holder can typically stay in the US for up to 6 months per visit.
A person with a B2 visa can typically stay in the US for up to six months per visit.
A visitor visa holder can typically stay in the US for up to 6 months per visit.
On a B1/B2 visa, you can typically stay in the US for up to 6 months per visit.
Yes, US citizens need a visa to visit Argentina.
Yes, US citizens need a visa to visit Kazakhstan.
Guam is a US Territory, and as such, just like any other US owned soil, a Visa is not required as long as you are a US citizen. Saipan also does not require a Visa to visit.
People from some countries are allowed 30 days without a Visa. Others are allowed 6 month tourist visit with out special Visa. Contact you local US Consulate or visit the US Imigration website for info on your country.
A B1/B2 visa holder can typically stay in the US for up to 6 months per visit.