A traveler walks by a Delta Airlines skycap kiosk at San Francisco International Airport. Justin Sullivan/Getty Images hide caption
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A Transportation Security Administration volunteer demonstrates a full-body scanner at Chicago's O'Hare International Airport in March 2010. Scott Olson/Getty Images hide caption
It's an age old question: What's the easiest way to board a plane? In this 1933 picture, passengers wait to board a new passenger service between London and Paris. Davies/Getty Images hide caption
Tight quarters: Aboard a United Airlines Embraer-145, 50-passenger jet. (June 1, 2008 file photo taken at Dulles International Airport.) Paul J. Richards /AFP/Getty Images hide caption
Julie Capper stands with her hologram at Manchester International Airport. Julie and her hologram work in the same area — which has created some confusion. Courtesy of Manchester International Airport hide caption