The festivities for our country&#39;s 238th birthday kick off on PBS&#39;s &#34;A Capitol Fourth&#34; with an all-star salute led by two-time Emmy Award-winning television personality Tom Bergeron.  The 34th annual broadcast of &#34;A Capitol Fourth&#34; airs on PBS Friday, July 4, 2014 from 8:00 to 9:30 p.m. ET. (PRNewsFoto/Capital Concerts)