Šiauliai

Aviationsoul.com. Let's set the scene.

Šiauliai Air Base, that's in northern Lithuania.

It's the primary hub for NATO's Baltic Air Policing Mission, the alliance's effort to provide air defense over Estonia, Latvia, and Lithuania, three countries that do not maintain their own combat aircraft.

NATO members rotate through on roughly four-month deployments, keeping fighters on alert around the clock.

It is, by design, a rapid response operation when something enters Baltic airspace without authorization.

Šiauliai is where the jets come from this week.

Something entered Lithuanian airspace without authorization.

A radar track appeared.