For years after the death of frontman Chester Bennington, members of Linkin Park weren't sure if the band would - or should - continue to exist.

The new documentary "Linkin Park: Unshatter" takes fans inside the uncertainty, grief and creative risk behind their return, including raw footage of early recording sessions, conversations and experimentation that eventually led to Emily Armstrong joining the group.

Formed in Agoura Hills, California, in 1996, Linkin Park became one of the defining rock bands of the 2000s by fusing alternative metal, hip-hop and electronics.