The most high-profile incident resembling a dry run happened on November 20, 2006 often referred to as the "Flying Imams" case. Six imams were removed from a flight after they prayed loudly in Arabic, spread out across the airliner to occupy different rows, ordered seat-belt extenders they didn't need and openly criticized U.S. foreign policy. They then teamed up with the Council on American-Islamic Relations to sue U.S. Airways.
As reported in Muslim Mafia, the leader of the "Flying Imams," Omar Shahin, has admitted to being a former supporter of Osama Bin Laden and his mosque in Tucson has been tied to Al-Qaeda. The previous president of the mosque worked with the terrorist group, and one of the 9/11 hijackers was an attendee. Remarkably, in 1999, two college students that went to Shahin's mosque engaged in nearly identical behavior. The two prayed loudly in Arabic, asked questions about the plane, walked around the aircraft, ordered a seat-belt extender that was not used and twice tried to open the cockpit. After they were removed from the flight, Shahin and CAIR began a lawsuit. The 9/11 Commission reports that it is now suspected that the incident was a dry run for the September 11 attacks.
The latest possible dry run is not an isolated incident, but the continuance of a pattern. Suspicious Muslims continue to probe our defenses and provoke security and then sue when the appropriate measures are taken. Whether the two men on that flight from Chicago were carrying out a dry run and/or engaging in "lawfare," the airlines continue to be a prized target for our adversaries.