True, but only two killed and then the "possible suspect" wanders off at large? Jihadists usually kill as many as possible until they're stopped by a bullet.
Your dad and I have worked in "secure buildings": "Can I use your card to pass in? I left mine at home."
Secure means you need a better clearance than I have.
However “at” could mean anything from inside to out at the smoking area to walking by on the way to the parking lot. It’s not clear whether they even worked there.
A friend of mine from A school works at AIRSTA Kodiak.