. >>> partridge family star david casady reveals his battle with dementia. >>> and one lucky tourist gets a whale of a surprise. "early today" starts right now. >>> good morning, i'm dara brown. four american tourists were killed when a small plane crashed into a shopping mall in melbourne, australia. the pilot was also killed. two victims have been identified as texans who were among a group of u.s. golfers traveling the globe to play the world's best golf courses. it happened an hour before the mall was supposed to open. the only fatalities were aboard the aircraft. they were working to extinguish the fire and they promise to carry out a full investigation. the plane suffered catastrophic engine failure after taking off from an airport nearby. it was heading to taz mania's king island. local government leader described the crash as the worst his state has seen in the past 30 years. >>> police and federal aviation authorities are investigating a serious security breach at a tsa screening checkpoint at jfk's airport. 11 passengers walked through an unattended metal detector monday mo