Led Zeppelin's eleventh and final concert tour of North America. On April 30 at the Pontiac Silverdome, the band performed for 76,229 people, setting a new world record attendance for a solo indoor concert. The tour featured six sold-out shows each at Madison Square Garden and The Forum in Los Angeles. The tour was tragically cut short following the death of Robert Plant's five-year-old son Karac on July 26, 1977.