Kunal Bahl returned to India to launch a business because he could not get a working visa in the U.S.
Some immigrants who come to Silicon Valley for a stab at fame and fortune are not sticking around. Instead, they're returning home to India, China, Brazil and elsewhere. Talented technology workers look at the growth of tech hubs outside the U.S. -- and the capital available abroad -- and pack up and go. Reporter: Aarti Shahani