The Federal Aviation Administration lifted a nationwide ground stop Friday evening after a five-hour stretch in which most flights were not allowed to take off from U.S. airports, according to The National Herald. The outlet reported that the stoppage was the longest of its kind in 25 years and affected thousands of flights and potentially more than a million travelers. Speaking at the White House, Homeland Security Secretary Markwayne Mullin said new technology being added to the air traffic control system overloaded antiquated parts of it, producing "intermittent" communications and radar gaps, The National Herald reported.