Security chief has no regrets about intrusive screenings. You should have seen the smile on Transportation Security Administration chief John Pistole’s face at the Global Business Travel Association’s conference ... You know the drill: Either step into the machine that takes your naked picture and zaps you with unneeded doses of radiation, or have a friendly TSA officer touch your “junk.” ... Pistole, in case you’ve wondered, is proud of his name, which is pronounced just like the gun. And if you were to say his name at a TSA checkpoint, you could be charged with a felony. “As an...