I have never seen BWI airport as busy as it was last night, an hour before midnight. Approaching the airport to pick someone up, the past about 50 cars on the s

I have never seen BWI airport as busy as it was last night, an hour before midnight. Approaching the airport to pick someone up, the past about 50 cars on the shoulder of the road that were just waiting with their hazard lights on. Traffic to the arrivals area was slow as molasses. I'm told the terminals themselves are packed with people whose flights were delayed to 1AM, 2AM, etc.