(Nina Mayer Ritchie/Johns Hopkins Center for American Indian Health via AP) FLAGSTAFF, Ariz. (AP) — The news came during a hopeful time on the largest Native American reservation. Daily …(Nina Mayer Ritchie/Johns Hopkins Center for American Indian Health via AP) FLAGSTAFF, Ariz. (AP) — The news came during a hopeful time on the largest Native American reservation. Daily …