President Obama was aboard Air Force One Wednesday evening en route to Prague for a nuclear treaty signing when a Federal Air Marshal subdued a passenger for causing a disturbance on United Airlines Flight 633 traveling from Washington, DC to Denver.  A White House Official says the President was briefed on the incident at 8:50pm et by his National Security Advisor General Jim Jones and National Security Staff Chief of Staff Denis McDonough who were both traveling with the President aboard Air Force One.  The White House says, "appropriate actions were taken to ensure the safety of the traveling public."  The incident is currently under investigation.