Heaven's Gate
Heaven's Gate is a destructive, doomsday cult centered in California. 21 women and 18 men voluntarily committed suicide in three groups on three successive days starting on 1997-MAR-23. Most were in their 40's; the rest covered an age range of 26 to 72.
Two months later, two additional members, Charles Humphrey and Wayne Cooke attempted suicide in a hotel room a few miles from the Rancho Santa Fe mansion; Cooke succeeded. Humphrey tried again in the Arizona desert during 1998-FEB and was successful.