In 1973, an employee of the Pentagon secretly copied documents about how the U. S. government misled the American people about U. S. military involvement in Vietnam. These papers revealed that the United States had been in Vietnam as far back as

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Explanation:

Daniel Ellsberg (born April 7, 1931) is an American economist, activist and former United States military analyst  and in 1971 when he released the papers popularly called the Pentagon paper which contains the actual date of The United States of America involvement in the Vietnam conflict, and clearly state that the Johnson Administration "systematically lied, not only to the public but also to Congress. The Papers also reveal that 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. According to the Papers,it states that 1950 was the actual date of US involvement in Vietnam conflict

d. it adversely affected american productivity

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