Answer:
Breaking the Berlin Blockade would lead to war with the Soviet Union.
Step-by-step explanation:
The USSR used the Berlin blockage in order to get the western Allies to ceed their German occupied territories. Due to the USSR having a larger number of military personnel in Germany and the US not wanting another war outbreak, the US and their Allies chose to airlift food and energy supplies into East Berlin. The trucks were backed into the planes because a lot of time was spent offloading supplies and there was no time for that.