Every walkthrough I've looked up for this game gives the same description for the part of the JBA headquarters at the catwalk where two guys are working on something with their backs to you and you have to creep past them and into a tunnel on the right. These walkthroughs claim to be for the ps3 version as well as other versions, but they all say to go up a ladder which is found through that tunnel. THERE IS NO LADDER ON MY PS3 VERSION. There is only a lock to pick, then at the same point, a cable to cut. You then only have the option to go back through the tunnel and sneak past the 2 guys again, in which I'm not quite sure where to go after that. Is there ANYONE who can enlighten me on what's going on?