Because the overhead bin space on airplanes is limited, you'll need to make sure the size of the suitcase is small enough to accomodate the airline's specifications.
Purchase a duffle bag that will fit in the overhead bins on most airplanes and you'll be able to carry it right on board the plane with you.
Explain how trajectory affects flight distance and vice versa in paper airplanes.
Some find it such a breeze, the boots have become their footwear of choice for wearing on airplanes.
The French were the first to use the symbol, on their airplanes during World War I.