What caused the Berlin Airlift?

Answer:
Stalin closed all roads, railways and canals leading to Berlin. This meant that the people of West Berlin would starve: therefore, the USA, France and Britain flew in supplies of flour, coal, milk and food. This continued until Stalin lifted the Blockade in 1949.
First answer by Meecj001. Last edit by Meecj001. Contributor trust: 9 [recommend contributor recommended]. Question popularity: 0 [recommend question].