Secrets of Operation Clean Sweep v1.1 Difficulty Level 3 out of 7: Cover from fire: 2 out of 7: Worth the effort: 3 out of 7: #4: Nice spot to take the flag as squad leader easy to access and fast. Just jump to the portable fuel tank, then to the boxes then to the roof. Alternatively if the fuel tank has been blow up you can use the old method for this building in the back jump on the rail then to the door then to the roof. #5