a research tool on thinkorswim. from td ameritrade. how much tax money? we're talking about $900 million, roughly, spent on a program the government says there is no scientific proof it actually worked. we're talking about behavior detection officers. if you've been to an airport, you may have seen them. there are about 3,000 of them at airports across the country. and like other tsa officers, they are in uniform. and here's how it works. they spend less than 30 seconds sizing people up. there's a checklist of behaviors that they're looking for that indicate stress, fear, or deception. if you exhibit enough of those indicators you are sent to a secondary screening for a pat down or possibly onto police. but this report says, decades of scientific research shows the ability for a trained person to detect deception is the same as or only slightly better than chance. erin? >> which is pretty shocking. so you've got nearly $1 billion spent on that.