Airports are getting crowded again now that COVID-19 restrictions are being lifted, but the crowds are going beyond the ticket counters and the security checkpoints. If you want to grab a coffee or a bite to eat, you’re going to have to wait for that, too. What’s causing the long lines? A worker shortage seems to be the culprit. Experts say the biggest demand right now is for cooks and in the meantime, some concessions are limiting their menus.