The House Science Committee held a hearing on the enhanced security measures foreign students and scholars in science, mathematics, and engineering face when they apply for a visa and subsequently enroll in an academic or exchange program in the United States. This hearing was the second in a series on the need for balance between heightened security and scientific openness in the post-September 11 environment. It explored the development and implementation of enhanced visa adjudication and monitoring systems and their impact on individuals, universities, and research collaborations. Witnesses were: (1) Janice L. Jacobs, Deputy Assistant Secretary for Visa Services; (2) Shirley M. Tilghman, President, Princeton University; and (3) David Ward, President, American Council on Education. Appendixes contain answers to post-hearing questions and additional material for the record, including the written statements of the witnesses. (SLD)