This is pretty much how I feel on the safety issue. "Suspicious by association". The logical, rational part of my brain accepts what RadioGirl says about the safety of the machines, but the irrational part of my brain is saying 'suspicious by association'. And then there's the lying. The TSA wouldn't know the truth if it came up and introduced itself and showed them its government-issued photo ID. They would lie about anything if they thought it was going to benefit them somehow. So no, I don't think they are lying about how the MMW machines work, but my irrational brain is asking 'what are they hiding?'