Yep - They are saying that it may be a Klingon battle cruiser.
Bah! I'd say a Corellian Corvette is more likely...
Seriously though, two thoughts on this thread. The first, a UFO means Unidentified Flying Object, not Alien Spaceship. A UFO could be a black project aircraft, small comet, meteor, satellite in a decaying orbit, or any number of other things that could become airborne and that at the time, people don't know what it is.
Secondly, what does this thread have to do with defence issues? It seems more appropriate in a forum that conducts alien conspiracy debates. Now, if someone has some info on a black project (fairly likely that someone on this has some) and is willing/able to release it (hah! that I'd say is very unlikely) then we might have a discussion. Otherwise, I'd recommend this thread be closed/locked since I can't really see it going anywhere worthwhile.