KNOXVILLE - A federal prosecutor today urged jurors to convict a former University of Tennessee student of unlocking to the world the door on conservative political star Sarah Palin's private Yahoo! e-mail account. "'I leave it to you,'" prosecutor Mark Krotoski said, quoting David C. Kernell's message on an Internet discussion board. "'I'm not going to ruin someone's life' but I'll give you the key, the pass(word). Instantly individuals from around the United States and around the world are in the account. That's what he wanted." But defense attorney Wade Davies countered that Kernell guessed using publicly available information his...