From Russel Targ's autobiography "Do You See What I See? Lasers and Love, ESP and the CIA and the Meaning of Life - Memoirs of a Blind Biker":

"It is also interesting to note that the aircraft that flew into the Twin Towers on 9/11 were unusually empty. I specifically checked to find that all the high-jacked planes were carrying only half or less, of the usual number of passengers. Perhaps one unusually empty plane could be explained away, but all four? Similarly W.E. Cox (at J.B. Rhine's Duke University laboratory) found in the 1950s that railroad trains that crashed or derailed on the East Coast had significantly fewer passengers on the day they crashed than the same trains on other days - even taking weather into account. These data show that people can indeed use their intuition to save their lives."