Some popular expressions came to mind recently as I was reading an article from Science magazine\u2019s online version: \u201ccrash and burn,\u201d \u201cthat won\u2019t fly,\u201d \u201crunning interference\u201d and \u201cthe ultimate denial of service.\u201dI was reading an article by Mary Beckman entitled \u201cHang Up and Fly\u201d that reviews some recent research by Naval Air Warfare Center aviation safety scientist Bill Strauss. He and his colleagues studied the incidence of unauthorized in-flight usage of electronic equipment such as cell phones and GPS units.Strauss\u2019 team studied 37 flights from three different airlines over a period of a month. The results showed much higher occurrence rates than the team expected:\u201cNot only did team members see people using their cell phones while flying, the recordings picked up between 1 and 4 signals in the cell phone range per flight. In addition, the team identified signals in the same frequency range as that used by some airlines\u2019 GPS navigational equipment. Although the researchers did not evaluate the GPS navigation during flight, the signals coming from the passengers have the potential to cloud the navigation device, says Strauss, especially if 200 people suddenly feel the need to phone home.\u201dIf the average incidence of such in-flight usage of RFI-producing equipment is confirmed across the industry, then we need better education, clearer policies, better monitoring and stronger enforcement.In July, the U.S. House of Representatives Committee on Transportation\u2019s Subcommittee on Aviation heard testimony from the Department of Justice, the Department of Homeland Security and the Federal Aviation Administration (FAA), all of which expressed concerns about proposed liberalization of rules preventing cell phone use in flight. On a completely different note, writer Grant Gross noted, \u201cSubcommittee members complained that airplane passengers can already be loud or obnoxious, without mobile phones to aid them.\u201dNetwork and security managers can contribute to the effort to maintain flight safety through their corporate security-awareness newsletters. As I have often mentioned, giving employees personally useful security information is an excellent way to engage them in the culture of security. You can point your colleagues to the FAA \u201cFact Sheet on Cell Phone Use\u201d here.Let\u2019s make sure we don\u2019t suffer the ultimate denial of service.