United Airlines Chief Executive Officer Scott Kirby said Sunday that the United States could face a potential pilot shortage, with his remarks coming as competitor American Airlines announced it was canceling hundreds of flights in July due to a staffing crunch. In an interview with “Axios on HBO,” Kirby said the possible pilot shortage was being driven by the fact that the military is not producing as many pilots as it did in the past. “The military produces far fewer pilots today than they did … in the Cold War era,” Kirby told the outlet. In context of the trend, Kirby said United had launched the Aviate Academy, where the company plans to train a new generation of pilots. His remarks come after American Airlines announced on Sunday it would cancel around 1 percent of its flights in July in order to make sure some of the company’s busier hubs are …