EL Cajon CA. 3/25/18. I was in my backyard and looked up to the sky when I heard a passenger airliner flying overhead, I soon noticed a very light gray in color Triangle shaped UFO moving quite quickly in a south direction. There was no sign of a vapor any kind of trail following it as one would see on most jets, military of commercial. I also noticed that the lines did not seem to be sharp angles but almost a roundness to them at the points, one other thing I recall is the body seemed to have a bit of a metallic finish.
The UFO Sighting was lost in the high cloud formations. source nuforc.org