This article is factually incorrect on a big point: airports are NOT using millimeter wave scans (X-ray) as a secondary scanning measure like the article indict

This article is factually incorrect on a big point: airports are NOT using millimeter wave scans (X-ray) as a secondary scanning measure like the article indictes; they are used as the primary security scanning measure, at leat at SFO and DTW (I know because I've opted out of both).