>>564086
The presence over the airport and the previous presence of surveillance aircraft suggests some kind of secret operation.
It follows:
1. CIA finds out sandniggers are smuggling in Stingers, Iglas, or something else.
2. CIA sends CN-235 to a couple of airports where the smuggling is suspected to take place.
3. Finds out if was Seattle International.
4. Sends in a ground team backed up by a AC-130 just in case.
5. Ground team succeeds in securing the shipment, AC-130 is called away without having to fire.
It's very standard op.