If you are currently playing as the Allies on the mission to destroy all the bridges with Tanya, first head down and destroy the Soviet soldiers. A medic will soon help you out. If you wish to eliminate a bridge, let the medic go first in the other side of the bridge far away from it. After that, set your target on the bridge and it will explode. This way, when Tanya gets hurt, the medic will still be alive and can cure you easily. Do this every time in this case.