Joining the all-star line-up for the 34th annual broadcast of PBS’ A CAPITOL FOURTH, live from the West Lawn of the U.S. Capitol, are platinum recording artist and songwriter Phillip Phillips and the world-famous Muppets.  Phillips will perform his hit single “Raging Fire” from his sophomore album Behind The Light that debuted in the Billboard Hot 100 upon its March release.  And, as a special treat for the entire family, Kermit the Frog and Miss Piggy – stars of the recent release of “Muppets Most Wanted” – will be on hand to celebrate America’s 238th birthday,…