Avoid suspicious areas and blocs, locate the nearest bus stops and subway entrances, and learn the schedule of public transportation in your area. Currently, I do not have a valid U.S. visa. I would like to apply for a green card, but have heard that there are legal changes under way that may affect my ability to obtain a legal status. That is true. This is probably all pretty hard for your to understand.
Some companies help foreign individuals to obtain a U.S. green card through investment.
My sister is seeking medical treatment in the United States for her mental disease. It may be extended one time. The visitor must be in the United States only temporarily and have a residence abroad. Also, a B-2 visitor must show that adequate financial arrangements have been made to carry out the purpose of the visit. I seems to me, however, that a mental disease requires a long-term treatment, certainly a treatment of more than one year.