Colorado became the 38th state to join the United States of America.
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Ted Bundy escaped from jail.
32-year-old Erik Weihenmayer from Boulder, Colorado, became the first blind person to reach the summit of Mount Everest.
Aurora shooting leaves 12 dead, 70 wounded.
The Supreme Court of Colorado ruled that Donald Trump is ineligible to run again for President.
Colorado became the second US state to give women the right to vote.
