Most military contractors will no longer be able to enforce mandatory arbitration clauses in their employment contracts under a provision signed into law over the weekend. The provision is included in the 2009-2010 spending bill for the U.S. Department of Defense…[Trial lawyers and consumers groups] say that clauses mandating the use of arbitration deny employees an impartial hearing in open court, while supporters of arbitration have defended the process as both fair and efficient. [refers to KBR]