06/25/2010 04:29 pm ET Updated May 25, 2011

Terrorism Expert Jessica Stern No Longer in 'Denial' About Her Rape

Jessica Stern, one of the world's foremost authorities on terrorism, never made the connection between her chosen profession and the terror she suffered as a teenager.

Stern was 15 and her sister Sara 14 when a blue-eyed stranger carrying a small handgun entered their home in Concord, Mass., on the evening of Oct. 1, 1973. The man threatened to kill them. Then he raped them. There was no one for the girls to turn to -- their mother was dead, their father on a business trip in Europe, the baby sitter had left them alone.