Hello! I'm going to study in the USA. So, after getting a Bachelor degree i would like to get an optional practical training. I've heard that an employer can ask a Higher authorities to give me a working Visa. But what is the best degree for doing it? I like criminal justice, paralegal, law enforcement, financial forensics and fraud investigation, maybe veterinary. What is the best option for that? If I understand something wrong, please explain me it. Thanks a lot in advance.