FAST seems to be some kind of polygraph-type scanner using cameras. It's very likely that it doesn't work but some military contractor will make millions off of it anyway. Any efficacy data will probably be unavailable or classified. Efficacy doesn't matter to the authorities anyway because having people believe that their minds are being read is almost as good as actually reading their minds.
Kind of like that report about how efficient the airport "backscatter" scanners were. All we know about the report is a congressman said that "if released we'd face public outrage". But hey, someone's making a ton of money out of it, so who cares...
http://www.foxbusiness.com/markets/2010/11/24/politicians-st...