By LINDSEY TANNER PAW PAW, Mich. (AP) — On a windy December morning in rural southwest Michigan, an American flag flapped at half-staff outside Paw Paw Early Elementary School. A social worker with a miniature therapy dog named Trixie offered comfort at the entry doors. Children wearing face masks scampered off buses into the morning chill, some stooping to pet the shaggy pup before ambling inside.