Colorado became the 38th state to join the United States of America.
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Mexican grill chain Chipotle opened its first restaurant.
Colorado became the second US state to give women the right to vote.
JonBenét Ramsey was found dead.
A rainfall survey named 'It is raining plastic' announced that tiny plastic particles were found in 90% of rain samples in Colorado, US.
A bomb hidden in checked luggage of United Airlines Flight 629 exploded over Longmont, Colorado killing all 44 people on board.
