Lifestyles Friday The 13th Phobia
FILE-This undated file photo shows President Franklin D. Roosevelt with his pet dog. "FDR would not depart on a (train) trip on the 13th," said Thomas Fernsler, a University of Delaware mathematician who has studied the number enough to earn the moniker "Dr. 13." He recounted a story that originated with FDR's personal secretary, Grace Tully, who said the former president would order the train to leave the station before midnight on the 12th or after midnight on the morning of the 14th. (AP Photo/File)
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