In reading some of the responses here, I think it is important to reiterate the definition of UFO.

A UFO is ANY Object, seen Flying or appearing to fly.
Thus the designation:
Unknown Flying Object

Now, Are they of Extraterrestrial origin?
Dunno.

I tell you what I Do know... a few more episodes of Ancient Aliens on the History channel and I Will be convinced.
A few matches, I Will go with Coincidence.
a few Hours of them and I Have to start believing something might be up.