• NPR.org, Tuesday, January 17, 2012 11 AM

Next month, Southwest Airlines will shove into Atlanta, home to the world's busiest airport and hometown of Delta Air Lines. Southwest, which bought Air Tran last year, will try to play up the differences between itself and Delta.

Southwest offers low fares, but the airline will also stress that it's fun to fly. For proof, there's a hit YouTube video from a couple of years ago in which passengers clap and tap their feet as Southwest flight attendant David Holmes raps all the way through the usually boring flight instructions.

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