The interview took place on the day of his murder. That's haunting, but the Lennon we hear in Steven Soderbergh's film is disarmingly upbeat.

The interview took place on the day of his murder. That's haunting, but the Lennon we hear in Steven Soderbergh's film is disarmingly upbeat.

Built around an audio recording made hours before the musician’s murder, the documentary moves through a vast assortment of archival stills and clips and adds a few visual…