Someone explain this. There are cameras covering virtually every square inch of shopping malls, office buildings, even gas stations and streets. I see them in airports all over. High definition, all kinds of detail covered. With the claimed importance of the security checkpoints, aren't there cameras at the checkpoints? If not, why not? If so, why can't this be reviewed. Why aren't the people manning the checkpoints required to be microphoned like cops, with even eye level cameras?