History of Jet stream

	Revision 3 . . December 18, 2001 12:22 am by GregLindahl [why we care about the jet stream]
	Revision 2 . . (edit) December 17, 2001 8:33 pm by Hannes Hirzel
	Revision 1 . . December 17, 2001 7:47 pm by (logged).253.64.xxx [stub]

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Difference (from prior major revision) (no other diffs)

Added: 3a4,5

The location of the jet stream is an extremely important datum for airlines. In the United States, for example, the time needed to fly east/west across the US can be increased or decreased by about 30 minutes if the airplane can fly with or against the jet stream.