This has been covered so many times. If you're taking an international flight, you're on your own. International terminals is where you most likely encounter dogs. If you're on a domestic flight, you simply put your stuff in a bag and put it in your crotch. When you go through security...you're just a normal Joe Blow on your way to see your girlfriend or whatever...take of your shoes, don't act nervous, comply with everything, and you'll skate right through.