WINDOW ROCK, Ariz. (AP) — A coronavirus variant first identified in Britain has been found on the Navajo Nation, tribal health officials said Tuesday. The United Kingdom strain was confirmed in a sample obtained in the western part of the …WINDOW ROCK, Ariz. (AP) — A coronavirus variant first identified in Britain has been found on the Navajo Nation, tribal health officials said Tuesday. The United Kingdom strain was confirmed in a sample obtained in the western part of the …