News & Your Opinion Halo Sat ,07 2424 6 months ago Last Updated : 01:00 PM 'The mystery continues': Nebraska city opens pyramid that guards world's largest time capsule in preparation for next year The self-proclaimed "Fourth of July City" revealed part of a 50-year-old mystery. HALO NEWSLETTER Keep reading HALO with a Free Subscription unlock this story instantly and join members and pros reading HALO daily -It's Free SIGN UP LOGIN