Trenches were common throughout the Western Front. Long, narrow trenches dug into the ground at the front, usually by the infantry soldiers who would occupy them for weeks at a time, were designed to protect World War I troops from machine-gun fire and artillery attack from the air.
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Key points
The Declaration of Independence and the Constitution are documents that provide the ideological foundations for the democratic government of the United States.
The Declaration of Independence provides a foundation for the concept of popular sovereignty, the idea that the government exists to serve the people, who elect representatives to express their will.
The US Constitution outlines the blueprint for the US governmental system, which strives to balance individual liberty with public order.
National treasures
In the US National Archives in Washington, DC, armed guards stand on constant watch in the Rotunda for the Charters of Freedom. There, underneath bullet-proof glass and beneath the watchful eyes of a state-of-the-art system of cameras and sensors, the faded pages of three documents are enshrined: the Declaration of Independence, the Constitution, and the Bill of Rights. At night, the documents are stored in an underground vault, rumored to be strong enough to withstand a nuclear attack.
Explanation:
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