サンドクリークの虐殺
On December 3, 2014, Colorado Governor John Hickenlooper formally apologized to descendants of Sand Creek massacre victims gathered in Denver to commemorate the 150th anniversary of the event. Hickenlooper stated, "We should not be afraid to criticize and condemn that which is inexcusable. ... On behalf of the State of Colorado, I want to apologize. We will not run from this history."