In August of 1969 the legendary Woodstock Music Festival took place. It has been known as having been a wonderful event, something to celebrate. Four months later, in December 1969, The Rolling Stones gave a free concert in northern California at the site of what was then the Altamont Speedway. The concert at Altamont will always be remembered as a horrific event in which people died and thousands of spectators experienced really bad acid trips. The journalist Joel Selvin wrote about it in