The Army Corps of Engineers has ordered thousands of demonstrators near the Standing Rock Sioux Nation to leave by Monday. They’ve been camped on federal land for months, trying to stop a massive oil pipeline project they believe will contaminate water sources and destroy sacred sites. Most of these “Water Protectors” are members of Native American tribes. And they believe the federal government and the mainstream media don’t understand the true purpose of their mission: that water has deep cultural and spiritual significance to indigenous people. In this audio postcard, we bring you the voices of two Arizonans who went to Standing Rock to protect the water they believe embodies life itself.