I don't know if they do it everywhere, but riding the train or bus is really the only way to get to the airport (or I could pay to park at the terminal for $25 a shift). Also, they have started a program (can't remember the correct acronym, but we call it Viper) and TSO's actually ride the trains for visual prescence (or something like that).
Daughter: What do you do at work Daddy?
Father: I make up names of inane TSA Programs in the hopes of tricking people in to thinking that we are working hard...even on our way to work!
Daughter: Oh Daddy! I love you!