On November 29, 1864, Colorado’s third cavalry descended on a village of Cheyenne and Arapaho, mostly women, children and elders. The massacre that ensued is often considered one of the worst in U.S. history. Colorado Gov. Hickenlooper has apologized for the massacre, but the Northern Arapaho tribe is now negotiating with the City of Boulder for other reparations: some land where the troops trained. Wyoming Public Radio’s Melodie Edwards spoke with Alan O’Hashi, a documentary filmmaker who just released a film about the negotiations.