" It appears as if the vehicle went off of an adjacent road. The Sherriff's office has launched a large-scale repelling operation and are calling in helicopter supports to check on the scene." http://www.ksl.com/?nid=148&sid=19131781&title=police-may-have-found-vehicle-of-missing-colorado-men-&s_cid=featured-1
Does a repelling operation consist of trying to force two giant magnets' south ends together? Producing smells that are noxious? Putting up repulsive billboards?
Or did they mean rappelling?