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cool pic...

http://antwrp.gsfc.nasa.gov/apod/astropix.html

pictured above resulted from a series of flares released by an air force jet over the Atlantic Ocean in May. The jet that released the flares, a C-17 Globemaster III, is seen on the right. The flares release smoke and the resulting pattern is sometimes known as a smoke angel. The circular eyes of the above smoke angel are caused by air spiraling off the plane's wings and are known as wingtip vortices.
 
You really get a feel for the size of that smoke angel when you see that the huge plane is in the foreground. Excellent pic!
 
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