72,000 because it's 20 miles per second times 60 equals 1,200 minutes times 60 equals 72,000 miles per hour
They wanted the areas that produced more gold.
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The Sand Creek massacre (also known as the Chivington massacre, the battle of Sand Creek or the massacre of Cheyenne Indians) was a massacre of Cheyenne and Arapaho people by the U.S. Army in the American Indian Wars that occurred on November 29, 1864, when a 675-man force of the Third Colorado Cavalry under the .
Answer: America The Story of Us is an epic 12-hour television event that tells the extraordinary story of how America was invented. With highly realistic CGI animation, dramatic recreations and thoughtful insights from some of America’s most respected artists, business leaders, academics and intellectuals, it is the first television event in nearly 40 years to present a comprehensive telling of America’s history. Elaborate, ambitious and cinematic, America The Story of Us will take you into the moments when Americans harnessed technology to advance human progress, from the rigors of linking the continent by transcontinental railroad–the internet of its day–to triumphing over vertical space through the construction of steel structured buildings to putting a man on the moon. It is an intensive look at the people, places and things that have shaped our nation, and the tough and thrilling adventure that is America’s 400-year history.
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I believe the answer is c, It weakened confidence that the US could win the war.