In 1954, a prison doctor in Kentucky isolated seven black inmates and fed them “double, triple and quadruple” doses of LSD for 77 days straight. No one knows what became of the victims. They may have died without knowing they were part of the CIA’s highly secretive program to develop ways to control minds—a program based out of a little-known Army base with a dark past, Fort Detrick. Suburban sprawl has engulfed Fort Detrick, an Army base 50 miles from Washington in the Maryland town of Frederick. Seventy-six years ago, however, when the Army selected Detrick as the place to...