i m jon kelley. i m marla tellez. happening right now, sfo is getting an upgrade. a groundbreaking ceremony for construction of a new control tower is just getting started. the 221-foot-tall building will have a modern look. it will be made out of aluminum and have an all-glass top. san francisco mayor ed lee and other leaders are attending this event. construction is expected to be finished by 2014. also happening right now, caltrains testing out its new alert system. now, here s the deal. it s all meant to try and take the guesswork out of your morning commute. nbc bay area s bob redell is live in santa clara with what s being done to try and help make your train get you there on time. bob, good morning. reporter: good morning to you, jon. anyone who s taken public transportation knows that buses and trains don t always run according to schedule. and that can really throw a wrench in your day, especially if you re trying to make it to a meeting. well, soon you ll know