Najam87,

Unless you are a US citizen, a US permanent resident or hold a temporary work visa you will not be allowed to be employed and receive pay.

If you're a 2nd year student your best bet is to try and get a research elective where you will personally bear all the costs of travel, housing, etc. This will allow you to get some experience and make some contacts. After you have built up your CV, you can then try to get a paid research elective later on in your student career.