COVE, Ariz. – In a corner of the Cove Chapter house on March 15, members of the Navajo Nation were silent as they looked at photos the Environmental Protection Agency showed of abandoned uranium mines in the Lukachukai Mountains Mining District during a …COVE, Ariz. – In a corner of the Cove Chapter house on March 15, members of the Navajo Nation were silent as they looked at photos the Environmental Protection Agency showed of abandoned uranium mines in the Lukachukai Mountains Mining District during a …