christopher shepard and lawrence dall daniels were killed.operly trained to perform work near energized rails are. the manage released a statement saying bart has fundamentally upgraded its safety proceed years with the implementation of an enhanced wayside safety program. >>> coming up, a large scale safety investigation on bart. for passengers, it may look real, but it's a training operation. tom is live with the impact. >>reporter: starting right now, a major effort is about to be underway. you see some of the players involved. starting now until 12:30, a joint law enforcement efforts. these are pictures we shot back in 2010 that was on a similar thing, bart police, the transportation security administration and many bay area state and local law enforcement working with each others are about to begin conducting join security training exercises here at the station. people at or near these mentioned stations should expect to see energy vehicles as well as armed uniform police and police k-9 units. the purpose is to prepare for americaning s