A vigil against germ warfare began in 1959 in Maryland.

Evidence

Beginning on July 1 that year, a group of people gathered on a road in Frederick, Maryland, near the entrance gate to Fort Detrick. They came every day. — Nicholson Baker, Baseless- My Search for Secrets in the…, 150

Categorization

• corroborated: 3 independent passages support this claim — Nicholson Baker, Baseless- My Search for Secrets in the…, 150