This is now the world's busiest airport... on certain Saturdays
https://edition.cnn.com/travel/article/anchorage-airport-world-busiest/index.html
If passenger transportation decreases and trading becomes busier, it's an opportunity to increase freight flights. It means airports mainly used for freight cargo can be busier than usual. Additionally, Anchorage International Airport is the best location for technical landing between Asia and Americas. Technical landing means to land on an airport on the way to refuel.
Both must have pushed the airport up to the world's busiest.
