. >> 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 vavek vadwad as one of the most outstanding americans. the actual title, outstanding american by choice. he was born in india. his res jooum long. harvard fellow, entrepreneur, but most remains at discussion is his book, "the immigrant exod exodus: why america is losing the global race to capture entrepreneurial talent." joined by john swartz of "usa today" and eric savitz of "forbes." when your book came out, you had a study that came out at the same time that said the largest drop in the percentage of immigrant entrepreneurs in silicon valley in a good long time. and you raised the alarm about that. why? >> because we had an influ