DALLAS -- Halliburton Co. (HAL, news) took a giant step toward completing its $4 billion asbestos litigation settlement Tuesday by filing for bankruptcy protection for its DII industries unit, which includes its Kellogg Brown & Root construction and engineering services business. The long-awaited filing is part of an agreement that would create a bankruptcy trust to handle all current and future lawsuits filed against Halliburton and its subsidiaries alleging that workers were harmed from inhaling deadly asbestos fibers. The trust fund, which will process and pay all valid claims, will be funded by Halliburton with a mixture of cash and...