Click here for updates on this story PHILADELPHIA (KYW) -- Don't open this until 2276: a time capsule with items from all 50 U.S. states and five territories is being buried in Philadelphia on America's 250th anniversary. The goal is for the Americans of the future to open this capsule on the nation's 500th anniversary — July 4, 2276. The significance of the event, and thoughts of the nation's distant future, drew emotion from several who attended.