If you want to guarantee a stop at every security checkpoint in the airport, just purchase your ticket within 48 hours of your flight or purchase a one-way. It's a slam-dunk. I spent a year-and-a-half commuting from San Francisco to San Diego for a project and spent way too much of my life in airports. I noticed a couple of things about searches - woman with infants and a percentage of folks in the 'more mature' category are ALWAYS in the search line. Strange days and strange ways... -Nancy.