Joe Medicine Crow

A portrait of Joe Medicine Crow in full headdress stands next to his casket during his funeral service at the Apsaalooke Veterans Cemetery near Crow Agency, Mont., Wednesday, April 6, 2016. Medicine Crow was the Crow Tribe's last surviving war chief and a widely-renowned historian. Medicine Crow, who died April 3, 2016 at 102, spent decades cataloging Crow history and was awarded the Presidential Medal of Freedom by President Barack Obama in 2009. (AP Photo/Matt Brown)

Brian Schweitzer

Climate Change Montana

This April 28, 2010, file photo shows the Colstrip Steam Electric Station, a coal-fired power plant in Colstrip, Mont. Montana Gov. Steve Bullock said Friday, Sept. 19, 2014, that Montana can comply with the Obama administration’s climate pollution reduction proposal, even while protecting energy sector jobs and avoiding the closure of coal plants that account for a major share of emissions. (AP Photo/Matt Brown, File)