New York, June 6 -- The Trump administration has closed a controversial program that used undercover U.S. air marshals on flights to surveil passengers, and removed a government official who took responsibility for putting Director of National Intelligence Tulsi Gabbard in it.

Department of Homeland Security (DHS) Secretary Kristi Noem called for an investigation into the program as she announced its closure on Thursday. DHS said the program cost taxpayers 200 million U.S. dollars a year and "failed to stop a single terrorist attack."

In a recent meeting, administration officials confronted leadership at the Transportation Security Administration over what they said was politically motivated use of the Quiet Skies program under the Bide...