All FReepers and lurkers in good standing are urged to join the D.C. Chapter of FreeRepublic.com this Saturday morning as we freep Al Gore at his Live Earth concert in D.C.An announcement was made this morning that Gore will appear at a surprise Live Earth concert at the National Museum of the American Indian on the National Mall in Washington, D.C.The concert is scheduled to start at 10:30 a.m. and will be held outdoors on the plaza with the Capitol in the background. Country music stars Garth Brooks and Trisha Yearwood are headlining the show.When: 10 a.m., Saturday, July 7,...