Shoot the rusted bars at the top of the ladder so you can climb and crawl through. Step on the platform, and when at the top, step on the panel on the ground to open up a locked door beneath you. If you look over the edge - be careful - thereΓÇÖs an Enforcer sitting behind one big-ass cannon. Try to peg him off before he has time to swivel the gun around. You must kill him so the cannon doesnΓÇÖt get you.
