A Clipper Card scam allows riders to ride for free.
You might see a lot of police at the Millbrae BART station Thursday, but don't be alarmed, it is all just a drill.
BART police and the FBI are teaming up to do a training exercise. They are going to practice tactics and check communications between agencies.
The training's at 11 a.m. BART says it will take place on an out of service platform and train so most people will not be affected.