2. Where do people have to travel in order to go from east to west of the United States by ship?

People, in order to go from East to West by Ship, had to cross through Central America.

Explanation:

Before the construction of the Panama Canal, people in the United States have to cross around the southern tip of South America. It was the longest route which took six-month to reach destination halfway around Cape Horn. With the Panama canal, travelling by ships became easier as it built to shorten the trip. The Panama Canal reduced time and money because it provided a water passage between the Atlantic Ocean and the Pacific Ocean.

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a, both were musicians during the jazz age