LATEST: Black triangle UFOs 'not piloted by alien beings'

[K626]

Triangle. Rumored developed in the mid-eighties..ie still fairly visible.

The more recent (90's) countermeasures craft are coated with gel metal that when electrified gives almost invisibility for short periods (the gel burns off and has to be re-applied).

SHARP - (Super- heated, aurora, reflective protocol).