A report by the FDA has said that airline meals may pose a serious health threat.

LSG Sky Chefs, Gourmet, and Flying Food Group were the three caterers named in the FDA report. These companies provide meals on Delta, American, United, U.S. Airways and Continental and are thought to collectively serve up to 100 million meals annually.
Roy Costa a former Florida state food inspector who reviewed the reports for USA Today, said the situation was disturbing and that "it poses a real risk of illness and injury to tens of thousands of airline passengers on a daily basis."
Source-Medindia