A plane takes off over a departure board at Hartsfield-Jackson Airport in Atlanta last November. Airlines say they expect an uptick in Thanksgiving travel this year. David Goldman/AP hide caption

itoggle caption David Goldman/AP

Air traffic connections from West Africa to the rest of the world: While Guinea, Liberia and Sierra Leone don't have many flights outside the region, Nigeria is well-connected to Europe and the U.S. PLOS Currents: Outbreaks hide caption

itoggle caption PLOS Currents: Outbreaks

Passengers packed the waiting hall Tuesday at Hongqiao Railway Station, which services a terminal at Shanghai Hongqiao International Airport. Johannes Eisele/AFP/Getty Images hide caption

itoggle caption Johannes Eisele/AFP/Getty Images

Coming in December: the eTrack and the eTag, from Air France and KLM. The innovations let you drop off your bags without checking them, and track them throughout your journey. Courtesy of FastTrack Co. hide caption

itoggle caption Courtesy of FastTrack Co.

The Butterfly Garden in Terminal 3 is just one of the pleasant diversions at the Changi airport in Singapore. Wong Maye-E/AP hide caption

itoggle caption Wong Maye-E/AP

A traveler walks by a Delta Airlines skycap kiosk at San Francisco International Airport. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

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

itoggle caption Scott Olson/Getty Images

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

itoggle caption Paul J. Richards /AFP/Getty Images