SEATAC, Wash. - A woman dying of breast cancer found herself in a battle with an airline as she tried to fly to South Korea from Sea-Tac Airport over the weekend. Despite clearances from two different doctors, Korean Air refused to let Crystal Kim board their plane. "I wanted to take my mom there for Mother’s Day," said Crystal's daughter, Mimi. But when they went to check in, the Kims said Korean Air told them Crystal look too frail to fly. "The first thing out of the ticket agent's mouth was, 'Is she OK t