Maybe I read too much Sci-fi, but when those folks at CERN get their thingamajig fired up and running, I'll be a tad less certain that the sun will rise next morning...
Shades of Dan Brown.
Kind of makes you wonder about the cool toys they have and don't tell us about.
There is actually a book about this...can't remember the name. The CERN scientists created a tiny opening into another universe. An alien collective organism noticed this and sent a nanomachine through the hole. The nanomachine used the concrete in the walls of the building to construct an army (millions of flies with instantly fatal bites, etc.) with which to kill everyone on earth and establish a colony of its own kind. It would take only a couple of days to kill everything on earth.
Two scientists found out about this through communication with a benign alien. They were able to form a time-like loop back to the past, and had to work on preventing the construction of CERN to prevent the future from happening (basically to stabilize the time loop in the variant that they desired).
One of the ways they did this was by weakening the US. They actually lobbied George Bush to leave Saddam Hussein in power and raise taxes in order to limit the strength of the United States and to limit it's ability to convince others to fund super-collider projects.
In the first reality, Bush had done all the right things and the world had emerged a better place...at least until everyone was killed by the alien nano-machines.
Check out the sample chapters at www.baen.com
Remember the movie I believe was titled "A Crack in the World?" This sorta reminds me of it. Ah me, I watch and read way too much sci fi. :)
If it's a small black hole, maybe it'll only swallow France.