A pilot with a major United States airline was confronted at his home in early December by four Federal air marshals and two sheriff’s deputies who were there to confiscate his Federally-issued firearm and his state-issued permit to carry a concealed firearm. His crime? He posted a series of videos to YouTube that showed flaws in the Transportation Security Administration’s screening procedures. The videos — since removed from YouTube — demonstrate how the flight crews are subjected to intensive pre-flight TSA screenings while the ground crews that service the aircraft are able to access secure areas by swiping a card,...