leston, South Carolina; Ann K. Wiggins, WIGGINS, CHILDS, QUINN & PANTAZIS LLC, Birmingham, Alabama, for Appellants. Cary A. Farris, John K. Linker, J. Shannon Gatlin, ALANIZ SCHRAEDER LINKER FARRIS MAYES, LLP, Houston, Texas; Dirk C. Phillips, Sarah M. Harris, ARNOLD & PORTER LLP, Washington, D.C.; J. Tracy Walk