82-year-old cannabis reform activist John Sinclair passed away due to heart failure; served 29 months in prison for marijuana possession in 1969, inspiring a John Lennon song.

82-year-old John Sinclair, a cannabis reform activist, poet, and counterculture figure, has passed away due to heart failure. Sinclair served 29 months in prison for marijuana possession in 1969, which inspired a song by John Lennon. The Beatles legend and his wife Yoko Ono, along with other notable musicians, performed a concert in Sinclair's honor at the University of Michigan in 1971.