Lines of latitude are parallel to the equator.
The majority of canals built in the United States were in the Great Lakes. That was the region.
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"Soviet Union increased its efforts to develop an atomic <span>bomb," since the Soviet Union was the rival super power of the United States after World War II.
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The Strategic Arms Limitation Treaty (SALT) agreements signed in the 1970s by the United States and the Soviet Union were efforts to "<span>(1) reduce Cold War tensions," since the direct aim was to eliminate large portions of each nation's nuclear arsenal. </span>
