A airline agents helps a travelers in the departures area of Terminal B at LaGuardia Airport, Tuesday, June 27, 2023, in New York. Travelers waited out widespread delays at U.S. airports on Tuesday, an ominous sign heading into the long July 4 holiday weekend, which is shaping up as the biggest test yet for airlines that are struggling to keep up with surging numbers of passengers. (AP Photo/Mary Altaffer)