What were the 'Pentagon Papers' and why were they significant?

“The Pentagon Papers revealed that the United States had expanded its war with the bombing of Cambodia and Laos, coastal raids on North Vietnam, and Marine Corps attacks, none of which had been reported by the American media.” And “The Watergate scandal was a major political scandal in the United States involving the administration of U.S. President Richard Nixon from 1971 to 1974 that led to Nixon's resignation.” These were important because it led to a change in American politics forever such as limiting the executive branch’s power.

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