One more thing about the airport...You probably will want to wear slip-on shoes coz lots of times they'll make you take them off and run them through the x-ray machine and they're just easier to get on and off than lace-up shoes. And don't wear a belt with a metal buckle, or if you do, just take it off and put it in the tray too, along with your keys, if you have them, just don't forget to pick up your keys like I did the last time. Luckily they paged over the intercom and described the key ring and I recognized it and went back for it before my flight left. Duh! Sometimes a bra with underwire in it will even set the detector off and they may want to pat you down. Don't take it personally, just spread 'em and let them do it. One time I flew not too long ago, I got searched at every darned gate. I must've looked like a terrorist or something. ;o)
The last few times I've been through, sometimes they're having you remove shoes, and sometimes not. Just wear something easy comfortable, without metal in it wherever possible, and don't carry anything in your pockets you don't really need. Double check your carry-on bag that you don't have any blades of any kind... no forgotten knives or guns or ammo from the last time you carried it somewhere :~)
And it doesn't hurt to seem pleasant and unhurried at the security check. Those people deal with a lot of difficult passengers who want to take all their frustrations out on everyone around them and the screeners usually seem pleasantly surprised if you smile at them. :~)
I've never been patted down, or even slowed down much, in security.