Researchers say passengers with more than one carry-on bag slow everyone down when they board planes. Seating such passengers away from one another in the airplane cabin, preferably in window seats, would allow everyone else to more quickly board and take their seats. "If you have a row to separate these people they aren't really bumping into each other, that's the idea. They can all be storing their luggage at the same time," said researcher Dr. R. John Milne.

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