Century Aurora 16 movie theater is pictured in Colorado April 27, 2015. Colorado's long-awaited cinema massacre trial will begin on Monday with jurors asked to decide whether gunman James Holmes was insane when he killed a dozen moviegoers in 2012, or a calculating mass murderer who deserves execution. Arapahoe County District Court Judge Carlos Samour has said he expects the trial to take four months.REUTERS/Evan Semon