Editorial: After $50 billion in aid, airlines still struggle. Congress must find out why

With recent flight cancellations, staffing snafus and other problems plaguing the airlines lately, there’s real concern the coming holiday weekend could become a chaotic mess for many Americans. Congress is starting to ask how, exactly, the companies have used the $50 billion in pandemic relief funding the taxpayers gave them over the past two years to ensure smooth operation — given that smooth operation is the opposite of what some carriers have been providing lately. It’s a valid question.