America’s Time Capsule is about to go underground until 2276. In honor of the United States’ 250th birthday, America250 will bury the zombie-proof historical repository this Fourth of July at Independence National Historical Park in Philadelphia, Pennsylvania. And you do not need to be in the City of Brotherly Love to watch. A livestream of the event will begin on July 4 at 8:30 a.m. EDT. Speakers...