On this day in 1969, The Rolling Stones headline the Altamont concert at the speedway in California. It's a free event with Jefferson Airplane and Santana also on the bill. It turns violent when the Hells Angels motorcycle gang, who are hired as security, kill a crowd member. The concert is documented in The Stones movie Gimme Shelter. | MONSTERS OF ROCK

TODAY IN BOOM HISTORY: 12/6/1969- A free music festival at California’s Altamont Speedway is marred by violence, including one homicide & three accidental deaths: two caused by a hit-and-run car accident & one by drowning in an irrigation canal. Scores are injured, numerous cars are stolen & property is damaged. Meredith Hunter, a concert goer high on methamphetamine who had tried repeatedly to crawl onto the stage where the Rolling Stones were performing, is stabbed to death by one of the Hell’