(Battle Ground, WA)  --  One woman is dead following a small plane crash in southwestern Washington state.  Police say 65-year-old Mary Rosenblum of Canby was piloting a Piper Super Cub "tail dragger" plane yesterday when she crashed into some trees between La Center and Battle Ground.  She was pronounced dead at the scene.  Authorities say she was the only person inside the plane.  The Federal Aviation Administration is investigation.