When Dr. Wilmer Garcia Ricardo came to the U.S. from Cuba he couldn't find work as a physician, and he had to figure out the licensing process almost entirely on his own. He's not the only one. An estimated 450,000 immigrants living in California have a degree but are underemployed. Many have to take on low-wage jobs. So why is it so hard to prevent ‘brain waste’ of highly skilled immigrants, especially in fields where so much help is needed? Guest: Farida Jhabvala Romero, KQED immigration reporter