The Holiday Travel Blob Has Begun

There was something curious about the US Transportation Security Administration’s data on passenger traffic at airports last month. The Sunday after Thanksgiving was, as usual, very busy, with 2.6 million people screened at security checkpoints. That’s the most on any single day since the pandemic began, and evidence that many people are back to traveling again. But other historical patterns didn’t hold. The Friday before Turkey Day, almost a week ahead of the holiday, was busier than the equivalent day in 2019 and almost as busy as the day before the holiday—traditionally the peak travel day of the year. People