Miami Art Week is over but one exhibit is sticking around: "The Art of Banksy" offers a 20-year snapshot of the world-renowned graffiti artist's best art pieces. Banksy’s identity remains anonymous, but in October the artist shocked art aficionados when someone bought his “Girl With Balloon” for $1.4 million at Sotheby’s Auction House in London and then, upon purchase, the painting destroyed itself with a shredder built into the frame. Now, Banksy’s former manager Steve Lazarides has brought a