Complex sentence: The Israeli pilots managed to shoot down two of the MIG-21's and then concentrated their attack on the airbase itself using the Mirage IIIC's bombing capabilities, they were able to crater the runways and cause light ground losses.
Split into simpler sentences: The Israeli pilots managed to shoot down two of the MiG-21s and then concentrated their attack on the airbase itself. Using the Mirage IIIC's bombing capabilities, they were able to crater the runways and inflict light ground losses.