Unalaska, AK – This morning the North American Aerospace Defense Command led joint exercise flights across the western parts of the United States and Canada, and some of these exercises took place in Southwest Alaska. Exercises were also conducted over northern California and northern Alberta in order to prepare for what's described as a "multiple threat scenario."

The NORAD exercises can cover a variety of scenarios -- from hijackings to unknown aircraft responses to airspace restriction violations. But NORAD spokesperson John Cornelio says that no one in Unalaska should be able to see any of that as planes did not fly over the city.

These flight exercises have become routine for the bi-national command since September 11.