"There are currently 500 body scanners, split about evenly between the two technologies, deployed in airports. The TSA plans to deploy 1,275 backscatter and mil

"There are currently 500 body scanners, split about evenly between the two technologies, deployed in airports. The TSA plans to deploy 1,275 backscatter and millimeter-wave scanners covering more than half its security lanes by the end of 2012 and 1,800 covering nearly all lanes by 2014." potential risk to such a huge contract with a company Chertoff is profiting from seems like a pretty darn good reason to delay the study.