Either before they received Ballinger’s warning or before they read it, Jason Dahl or LeRoy Homer Jr. checked in with a routine altitude and weather report to an air traffic controller at the FAA’s Cleveland Center: “Morning Cleveland,64 United Ninety-Three with you at three-five-oh [thirty-five thousand feet], intermittent light chop.” The controller didn’t reply; he was busy rerouting planes affected by the ground stop. At 9:25 a.m., Flight 93 checked in again with Cleveland Center. This time the controller answered, but still he didn’t warn them.
