WATCH LIVE: Washington Pays Tribute To John McCain

The late Sen. John McCain will be honored at an expansive ceremony at Washington's National Cathedral on Saturday. Former President Barack Obama and former President George W. Bush will give remarks, along with McCain's longtime friend Sen. Lindsey Graham, R-S.C., and several others. Three of McCain's children will give readings, and Renee Fleming will perform "Danny Boy" at the late senator's request.