Rachel Alon-Margalit (left) and her older sister Yael Alon-Rosenshain, daughters of Israeli air force military attache Joseph Alon, who was killed outside their Chevy Chase home in 1973, are pictured at the home of a friend as they prepare for the screening of a documentary on the case. (T.J. Kirkpatrick/The Washington Times)

Photo by: T.J. KIRKPATRICK

Rachel Alon-Margalit (left) and her older sister Yael Alon-Rosenshain, daughters of Israeli air force military attache Joseph Alon, who was killed outside their Chevy Chase home in 1973, are pictured at the home of a friend as they prepare for the screening of a documentary on the case. (T.J. Kirkpatrick/The Washington Times)