Flights are taking off and landing at New York City-area airports with some delays and cancellations after technicians repaired data lines that failed at a key regional air traffic control center in Philadelphia. That failure caused hours of flight disruptions and cancellations throughout the Northeast on Monday. Transportation Secretary Sean Duffy said in an online post that primary and backup telecom lines were fixed by Monday evening, allowing affected airports to resume operations. Hundreds of flights were canceled at the Newark, LaGuardia, Kennedy and Philadelphia airports due to the technical problems.