The Tesla automatic braking mystery. Los Angeles Times reporter Russ Mitchell joins Princeton’s Alain Kornhauser and co-host Fred Fishkin to to explore the questions surrounding automatic emergency braking in Teslas and other cars. The systems have to work before there can be autonomous mobility. Plus GM unveils Ultra Cruise, the 5th annual Princeton Smart Driving Car Summit moves to May and actor William Shatner prepares for liftoff.