Passport
If you are planning to visit the United States, make sure all of your official travel documents are current, as you will need those to get in the country and return home.
All visitors from abroad who are planning to visit the USA must have a passport valid for at least six months longer than their intended stay in the U.S., unless they are exempted by country-specific agreements.
For families traveling together, each member of the family must have his or her own passport, including infants and children.
If your passport is lost or stolen, immediately report it to the police and contact your local consulate or embassy of your country of citizenship for a replacement. Most consulates have information on their websites for canceling a lost or stolen passport.
VISA
Depending on the issuer of your passport, a visa may be required for entry into the United States.
Questions on embassy or consulate-specific visa application procedures or questions about your specific visa case should be addressed to the U.S. embassy or consulate where you will be applying.
The USA welcomes international students and educational exchange visitors. The first thing to know is that visas for students and exchange visitors are different than tourist visas.