I think the answer is 24 seconds
Neville chamberlain. Was a British conservative politician who servers as prime minister of the United kingdom from May<span> 1937 to </span>May<span> 1940 ... How did the attack </span>change<span> American Isolationism. It made ... What event </span>took place at Versailles<span> in 1919 ... How many years was it </span>between<span> Japan's attack on China and pearl harbor.</span>
Range (we can talk with almost anyone almost anywhere), Capacity (large servers allow for large messages), Availability (Many more people can write and read than 2,000 years ago), etc.
Examples would include: The telephone, The trans-atlantic cable, Postal Delivery, The internet, Large books, etc.
Answer:
The Berlin Blockade of 1948 to 1949 marked the beginning of the Cold War, the building of the Berlin Wall in 1961 represented the high point of tensions and the opening of the Wall in 1989 represented the end of Cold War