Residents of a San Francisco Bay Area city are on the lookout for an aggressive squirrel that has sent at least two people to the emergency room for medical treatment. Joan Heblack told ABC affiliate KGO-TV that she was walking in the Lucas Valley neighborhood of San Rafael when a squirrel seemingly came out of nowhere and attacked her leg, clawing and biting. “It clamped onto my leg. The tail was flying up here. I was like, ‘Get it off me, get off me!’,” Heblack said. Isabel Campoy also said she was attacked while walking in the same area. The...