For your visa application, please provide a letter from your U.S. advisor that:
1.) Explain goals of applicant’s research and any practical applications;
2.) States sources and amount of any U.S. government money/or (funding from U.S. corporations assisting the U.S. government) to be used to support that research.
3.)Describes any export-controlled technology and/or information will be shared with the applicant. If the applicant will participate in or have access to U.S. government project.
4.) Sponsor should state explicitly whether such research is open to non-U.S. citizens.