January 24, 2020 6:58 pm Larry Gerston on Obstruction Tied to National Security NBC Bay Area’s political analyst Larry Gerston talks about the fourth day of impeachment trial where the House impeachment managers tie presidential abuse of power to national security. US & World Videos 3:23 UC Davis finds brain sizes are growing 3:36 Waymo expands driverless taxi service 5:21 A closer look: 2 police officers shot, injured in San Jose 1:26 Pursuit standoff ends in the North Bay 2:40 Pro-Palestinian protests continue at UC Berkeley