The berlin airlift was used during the cold war to
(1) rescue people fleeing west germany
(2) prevent a communist takeover of greece and
turkey
(3) overcome a blockade created by the soviet
union
(4) support peacekeeping efforts by the north
atlantic treaty organization (nato)

The Berlin airlift was used during the Cold War to 3. overcome a blockade created by the Soviet Union. The Soviets closed land routes to West Berlin - a region of Germany under the care of Western nations but completely within Soviet controlled East Germany. After closing those routes, West Berlin was cut off and needed supplies some other way. To overcome this, Western forces flew planes over the city and dropped supplies.