The Mount Kuamar Mission, Part 3 (Sniper Ghost Warrior Contracts 2, Gameplay 4)

Part 3 of The Mount Kuamar Mission continues the mission where Part 2 left off. After sabotaging the main antenna, I make my way to the final jamming tower and managed to disable it while killing a few enemy soldiers in the area. Once that was taken care of, I fast travel to the Citadel and gain access to the underground facility. Once inside, I locate Lars Hellstrom on Level B2. But an elevator in the facility can only take me to Levels B0, B1, B3, and B4. So, while killing enemy soldiers in the facility, I take the elevator to Level B1, where I maneuver around until I see a ladder leading to Level B2. And as soon as I get to B2, I kill Hellstrom and his security team, grab his keycard, get back to the elevator and go to Level B4 where the mainframe is, kill enemy soldiers in the area, and upload a virus to the mainframe. When the alarm is triggered, I had to kill the head of security, Amaya Nakamura, and get her keycard to disable the alarm and finish the mission. And I did.