Mission 5: Washington Monument
In dark zones, question and eliminate the men tailing Coste.
Victor Coste and Sam set up a rendezvous point in the bustling fair, but Black Arrow have put a dent in their plans by having Coste closely monitored by three agents. The mission objective stresses the importance of ridding these tails in the shadows and out of overt view of the innocent civilians. Therefore, it's an automatic mission failure if Sam is caught either by one of the tails or a civilian witnessing Sam's brutality.
The locations of the three tails are marked on-screen by a small, white icon. Each tail follows some sort of set patrol route that passes by dark areas. Once a tail has been found, stick close to him, but remain unseen until Sam is ready to strike--preferably in a shadowed area between game stands and whatnot. After all tails have been dealt with, Coste summons Sam to the building at the base of the Washington Monument.
Meet Coste in the lobby of the Washington Monument
Follow the distance marker to Coste's location, where he hands Sam a bag filled with a few new toys. Being among them, the Five-Seven pistol is a mean little pistol and arguably the best one in the game, in the author's humble opinion. It also grants an additional Execute target, bringing the total number of targets to three now. Should come in handy soon! At this point, too, a loud speaker falsely reports a gas leak in the vicinity and forces a large scale evacuation of the entire fairgrounds.
Escape through the fair to your car.
Heavily armed Black Arrow dogs have already inundated the fairgrounds by the time Sam parts way with Coste. As he approaches the entrance to the fairgrounds, ease more to the right side and avoid running in plain sight of the entrance. On the right side, Sam should be able to find and crawl through a small tunnel underneath this stand. There are many more of these crawl spaces underneath various attraction stands throughout, so be sure to utilize them. The newly acquired toy, the Portable EMP, comes in real handy. In fact, now's a good time to use it to disable the lights and all electronics in order to slink past these trigger-happy bozos. Stay relatively toward the right side to find another crawl space not too far from here.
From here, it's up to the player's wit to bypass the rest of these guards. The author gained a few Executes here and there and also deployed a Remote Mine to cast attention away from the destination. As a whole, you shouldn't be using the Portable EMP more than twice, but use it in sticky situations. Also be sure to run when the effect is in place to take full advantage of this exploit. Near the end are three guards that can be cleanly Executed from a dark area on the side. Afterwards, if there is a Portable EMP handy, fire it off as Sam races toward the car to throw the remaining nuisances into a daze. Otherwise, just make a break for the car. (Though on Realistic mode, you might want to actually deal with the guards.)