CERN had its first run of the $9 Billion, 17 mile long Hadron Collider and we still exist.  There were fears that the use of such a device could cause a mini black hole causing the destruction of Earth as we know it.  The system took 48 seconds to power up and then accelerated the particles for the first 3Km of the entire circuit. They will continue to extend the range and we can assume we will exist when they do so.  The creators of the project are hoping they can unlock the "God" particle and explain the origins of the universe by slamming particles into one another at 99% of the speed of light.