At the beginning change sniper rifle to one of the machinegun lying in front of you. It will be useful later but now use mainly MP5. Jump on the ground and quickly run toward building with blue flag with white star. Run into it through the passage on the left side.
Once you are inside quickly move to the stairs on your right. Kill all enemies and your first target who will be waiting at the top of the stairs.
Run to the room on your right and reload at the same time, after that jump on the street through the window.
Run into the hangar on the other side of the street. Inside turn right and kill all enemies and your second target. He is somewhere between the crates.
Now back to the beginning of the hangar and run through the exit in front of you. Quickly move toward wooden gangway on your right, run to the end of the platform and throw flash bang behind concrete pillars in front of you.
Immediately jump to the ground on the right and run under the concrete pillars on your right. Move to the second one and start firing at enemies.
Now run on the wooden crate and jump on the jetty.
Quickly hide in the container on your right and free the hostages (look at them and press F). Now lay on the ground in the corner, throw smoke grenade (press Q) in front of the container and start shooting at approaching enemies. It's a good moment to use your machinegun, but when your magazine will be empty don't reload it, just change weapon form MP5 and continue shooting. Remember that you have to be deep inside the container because in some moment helicopters shows on the sky and if you will be leaned out they quickly kill you. After a few minutes with seconds allied choppers shows on the sky and when all enemies fall back the mission will end.