THE PICTURE WAS CAPTURED ON JUNE 3, 2006 ON THE IDAHO/WASHINGTON BORDER.
THE EVENT LASTED ABOUT 1 HOUR. CLOUDS HAVE TO BE CIRRUS, AT LEAST 20K FEET IN THE AIR, WITH JUST THE RIGHT AMOUNT OF ICE CRYSTALS AND THE SUN HAS TO HIT THE CLOUDS AT PRECISELY 58 DEGREES.
The scientific name is Circumhorizontal Arc.
I got this in an e-mail and thought it couldn't be real. So I checked and snopes says it's legitimate.
Pretty cool, huh?