It's time now for Ask An Expert. Every weekday at 9:20 AM on KCBS, we're giving you direct access to top experts in various fields. We're breaking down the last week in immigration news. As U.S. Marines and National Guard troops respond to protests in Los Angeles, a number of Bay Area cities have also reported ICE activity and arrests. To help us sort through it all, KCBS Radio news anchors Margie Shafer and Eric Thomas spoke with Bill Hing, professor of immigration law and policy at the University of San Francisco.