AMR Corp.'s American Airlines and United Continental Holdings Inc. must face a federal trial over negligence claims tied to the hijackings of jetliners on Sept. 11, 2001, used in the terrorist attacks that killed about 3,000 people in New York, Washington, D.C., and Pennsylvania, Bloomberg News reported yesterday. World Trade Center Properties LLC, which owned the twin skyscrapers in lower Manhattan destroyed in the attacks, sued the airlines in 2008 alleging negligence against the carriers for allowing terrorists to board and hijack the planes that were flown into the buildings. U.S. District Judge Alvin Hellerstein in Manhattan said that a trial is required.
