with reporters eric savitz of "forbes" and "usa today's" john soares. this week on "press: here." >>> good morning, everyone. i'm scott mcgrew. a neat little american success story for you. a young couple graduates from the university of wisconsin. they create an app for facebook, get millions of users, and start a company. just one problem. the problem is they were here on a student visa. anand and shika shapar were unable to get permanent residency in the united states. so the couple and their business went back to india, where the company operates today. >> we found 52% of the start-ups in silicon valley were founded by people like me. >> vavek vadwad has sounded the alarm on this brain drain. foreign-born entrepreneurs leaving he says subtracting jobs and tax revenue from our economy. the value of foreign-born entrepreneurs is well known in silicon valley. sun microsystems was started by an indian immigrant, intel by a hungarian, ebay a frenchman, google a russian. tesla motors and spacex by a south african. the u.s. government itself has named vave