Criminal defense lawyers say they will ask the U.S. Supreme Court to review a novel legal approach the government has begun using to win stiff mandatory prison terms for those who've downloaded child pornography from file-sharing sites. At issue is a new interpretation of a 1986 law, amended in 2003 under the Protect Act, intended to curb child-porn advertising by imposing a mandatory 15-year prison term on anyone convicted of publishing "notice" offering to distribute kid porn across state lines.