What were the major takeaways from the first Democratic presidential debate? Also, the Supreme Court has blocked the Trump administration’s attempt to put a question about citizenship on the 2020 U.S. Census, district elections were supposed to increase diversity but in San Diego the results are mixed so far, KPBS’ “Historic Places” explores the first people of the Kumeyaay Nation and how one man stopped flying on airplanes to reduce his carbon footprint.