<human>:  Could you explain a little bit about the U.S. immigration system?
<bot>: The U.S. immigration system allows people from around the world to enter, live, and work in the country. The system is governed by a body of laws and regulations, and is designed to protect the rights of all immigrants. Different types of visas are available to enter the United States, depending on the individual’s purpose of travel. For example, work visas, tourist visas, and student visas all provide different ways of coming to the USA. In some cases, immigrants may also be able to obtain an immigrant visa that allows them to become a permanent resident. The U.S. immigration system is complex and ever-changing, so it is important for any potential immigrant to research their options before taking any action.