It has been a week of mourning after a string of mass shootings struck three California communities in the span of just a few days. On this edition of KCBS In Depth we speak with some of those who are helping to rally the community response to these tragedies. Then in the second half of the program, we also discuss gun control in California, and hear why even as calls for further reform grow louder the legal challenges are also getting steeper. Guests:  Deborah Penrose, mayor, Half Moon Bay  Cynthia Choi, co-executive director, Chinese for Affirmative Action | co-founder, Stop AAPI Hate  Adam Winkler, constitutional law professor, UCLA Dr. Amy Barnhorst, associate director, Violence Prevention Research Program at UC Davis  Host: Keith Menconi