Native American activists verbally clashed outside Chaco Culture National Historical Park on Sunday, derailing a visit by U.S. Interior Secretary Deb Haaland, who was there to celebrate a 20-year buffer around a World Heritage Site in northwest New Mexico. Haaland’s trip to Chaco on Sunday was canceled when a group of Navajo land allotment owners blocked the road, upset with the Biden administration’s recent decision to enshrine for the next 20 years what previously had been an informal 10-mile buffer around the World Heritage site. The buffer protects the area from future federal mineral development, including oil and gas drilling....