If you fly Southwest, you probably love that the airline doesn't charge you to check your bags, and their one-class open-seating policy seems to work. But that could be about to change. CBS News travel editor Peter Greenberg has more. 

(Photo by Bruce Bennett/Getty Images)

<p>If you fly Southwest, you probably love that the airline doesn't charge you to check your bags, and their one-class open-seating policy seems to work. But that could be about to change. CBS News travel editor Peter Greenberg has more. </p>
<p>(Photo by Bruce Bennett/Getty Images)</p>

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