When crossing the US border each person will be required to fill in two documents:
1) l-94 in this document specifies the terms and purpose of the trip, the hotel in which you plan to stop his name and address.
2) customs declaration (Customs Declaration). Documents issued to fill the plane.
At the border will install term solution for you stay in the United States. The maximum period of 6 months, but it may be limited by flight dates.
After passing through immigration control you get coupon, it should be maintained until the end of your stay in the United States and return when leaving the country.
Terms of baggage are determined depending on the class and airlines according to specific standards, all the necessary information you will be able to learn from the carrier company.
When connecting flight to the US, you must go through passport and customs control at the border crossing point 1, after which you have to collect your luggage and re-submit it to the registration point of transit passengers, otherwise the luggage can be lost. These rules apply to all transit flights, even in the case when these flights of one airline.