TUCSON, Ariz. (AP) — Wearing an oxygen pack on her back for her COPD, Marcia OBara is leading a group of nature enthusiasts on a mission to see birds. They carry walking sticks on the flat trails, moving at their own pace, without pressure or competition and enjoying a sense of community. This is Birding for Every BODY, one of numerous such excursions offered each month by the nonprofit Tucson Bird Alliance with Arizona’s Pima County. It’s part of a growing national movement to help people with