The March from Selma to Montgomery was designed to dramatize the need for the Johnson Administration to pass a Voting Rights Act.
Explanation:
Tens of thousands of people died because of prohibition-related violence and drinking unregulated booze. The big experiment came to an end in 1933 when the Twenty-first Amendment was ratified by 36 of the 48 states. The Twenty-first Amendment was deemed so necessary (and the Eighteenth so ineffective), it is the only Constitutional amendment ever passed to overturn a previous amendment. Hence, Prohibition was a terrible mistake.