HOUSTON (AP) - Like a scene from the horror movie "The Birds," large black grackles are swooping down on downtown Houston and attacking people's heads, hair and backs. Authorities closed off a sidewalk after the aggressive birds, which can have 2-foot wingspans, flew out of magnolia trees Monday in front of the County Administration Building. "They were just going crazy," said constable Wilbert Jue, who works at the building. "They were attacking everybody that walked by." The grackles zeroed in on a lawyer who shooed a bird away before he tripped and injured his face, Jue said. The lawyer was...