http://aviation.stackexchange.com/questions/9724/how-are-condensation-cones-created-by-supersonic-airplanes

Use your favorite (Google?) search engine and search Condensation Cone
Vapor Cone

Am aircraft need not be supersonic to create a vapor cone, and yes it can travel along and appear in multiple shots.

Since no one here can positively "Identify" the Aircraft it certainly could be called a UFO in the loosest of terms.

The lens flair theory is equally credible.

You have a wonderful series of beautiful images...

Well then, it could be a UFO, but I doubt it. Since no one else has ever produced a credible photo of one, why should you be so lucky? :-D
Could be a jet fighter, but since the military imposes strict limits as to when, where, and at what altitude it's planes can break the sound barrier, I doubt that also. If it was over water and later in the day, maybe, but over presumably a populated area, at dawn, at what appears to be relatively low altitude would be unlikely. I think 40,000' is the minimum altitude the military allows supersonic flight over land.
If it wasn't some type of lens flare then perhaps it was some freak atmospheric condition, or even something caused by a subsonic aircraft under just the right conditions.
Make the best of it! Sell it to the gullible as proof of UFOs or some new gov't conspiracy! You could get your 15 min of fame! :-D