>>shepard: it is hard to keep a secret that can be heard from miles away but that is not stopping the military from trying. the air force launch add top secret unmanned spacecraft. like a space drone. about the fourth the size of the shuttle and it orbiting earth once before in 2010. officials are not talking but it is likely testing out new equipment for spying but we don't know. it is about $1 billion. there is a theory they could be pulling a fast one. i have no idea, personally. a judge today halted construction on part of the controversial keystone pipeline that crews are working to expand the line. supporters say this could create new jobs. in east texas, a land owner says the company behind keystone