NEW : Civil liberties group files suit against Napolitano , Pistole . NEW : Obama administration says it will not prosecute CIA officers for waterboarding detainees in secret Score: Rep. John Mica sent a letter to aviation authorities discussing airport privatization . It is not clear whether private screening is more efficient than TSA procedures or whether such screenings would meet federal safety standards . A public interest research group said it is suing DHS over scanner information .
NEW : Civil liberties group files suit against Napolitano , Pistole . NEW : Obama administration says it will not prosecute CIA officers for waterboarding detainees in secret Score: Rep. John Mica sent a letter to aviation authorities discussing airport privatization . A public interest research group said it is suing DHS over scanner information .