it's a cargo plane ..
firing missile decoy flares.

i think, um, maybe.
( BrainsOnToast happily killing your pets since, Tue 31 Jan 2006, 15:21, archived)

Now that you mention it
the sparkles at the ends kinda give it away.
(Psychosomatic Tumor Laugh your life cause there ain't much to cry for, Tue 31 Jan 2006, 15:24, archived)

Correct!
You win a biscuit.

Link : www.strategypage.com/gallery/articles/decoy.asp
(PrinceMong, Tue 31 Jan 2006, 15:26, archived)

and
it's travelling at transonic speed showing a vortex from the wingtips
( atomboy, Wed 1 Feb 2006, 11:22, archived)