TNTAmazon. com Like their moniker suggests, Tortoise wield a thick exterior of styles while the essence of their sound smoothly beats on. They brazenly titled their latest endeavor TNT as if to signal a break from their former shell. But don't be deceived by explosive associations, for the acronym is meant to stand for "Tough N Tender." The album displays a tenacious level of technical proficiency and creative divergence from five Chicago guys doing what