Colorado became the 38th state to join the United States of America.
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Ted Bundy escaped from jail.
15 die in the Columbine High School massacre.
Aurora shooting leaves 12 dead, 70 wounded.
A bomb hidden in checked luggage of United Airlines Flight 629 exploded over Longmont, Colorado killing all 44 people on board.
32-year-old Erik Weihenmayer from Boulder, Colorado, became the first blind person to reach the summit of Mount Everest.
