The entire world is covered in UFO sightings. Don't believe me? Check out UFO Stalker where they list the most recent ones and update them live. Of course a few are going to find their way drifting over Michigan skies. Like this one:
While this one might not be part of the Detroit Underground in a literal sense, maybe it's a part of the Detroit Aboveground.
On Oct 7, 2009 a mad rush for free money broke out in Detroit. As citizens pushed forward in line to submit applications and fill out applications to recieve housing funds under Obama's new housing agenda. A sign of the underground desperation that stirs just beneath the surface in the Detroit Underground.