Checkpoint A. When the mission begins, jump over to the first building. Jump 
  over the electric fence. There is a building with a locked service entrance 
  and satellite dish on top. Climb up on the building, and go to the dish. A bag 
  is hidden between two vents.
  Checkpoint C. While chased and shot by the helicopter, you will see an orange 
  and white building to your right. Run around that building, and jump down onto 
  the rooftop that follows (before jumping on the blue stairs). A bag is behind 
  an air vent on this roof.
  Checkpoint E. While running through the Centurian plaza, there is an open area 
  that leads to train tracks. Go under the steps to the tracks, then turn left 
  in the shadows. Climb over a fence to reach a bag.