United Airlines, which depends on the airport in Newark, New Jersey, canceled the most flights among U.S. airlines for a fifth straight day. Tia Hudson was back at Newark Liberty International Airport for the fourth straight day, trying to catch a United Airlines flight home to Louisiana. United Airlines CEO Scott Kirby blamed a shortage of federal air traffic controllers for massive disruptions last weekend at its Newark hub. “Staffing at FAA’s air traffic facilities in NY is at 54%,” Cruz tweeted. The FAA is training about 3,000 new air traffic controllers, but most of them won’t be ready anytime soon.