Opinion: Remembering Sandra Grimes, mole hunter

Sandra "Sandy" Grimes, who worked at the CIA from the late 1960s, at home in Great Falls, Va. As one of the investigators in Operation Playactor, Grimes created a chronology that was instrumental in identifying Ames as a spy.

Sandra Grimes died at the age of 79. Her work was crucial in catching a Soviet agent who "caused more damage to the national security of the United States than any spy in the history of the C.I.A."

(Image credit: Nikki Kahn)