Concert violins are the thoroughbreds of the violin world, a breed apart from even fine professional-caliber orchestral violins. A concert Stradivarius or Guarnerius violin can cost millions of dollars, making these instruments prohibitive for gifted artist from modest backgrounds. In this video, hear violinist Rachel Barton Pine talk about the "ex-Soldat" Guarnerius violin the is hers to play, on generous loan from her patron. And hear Rachel play that instrument live on Classcial 101 today at 1 p.m.