Surprised nobody here flew through LAX on Tuesday when the Pre-Check lane was closed because the WTMD or bag scanner was "broken." I was LLL'd, but the very apologetic ID checker explained it something was broken and they were "working to fix it quickly."
By the way, LAX is replacing the backscatter machines with MMWs. T5 is all MMW now. The other terminals will be converted over time, according to the TSOs I talked to.