[She echoes:] Guard duty. [Shepard almost sounds amused. It's been a hell of a long time since she's been low enough on the food chain that guard duty was actually on the table.]

And my question is, why are the best-trained soldiers of the lot stuck sitting on their hands at home base? [A slight headshake.] If there's anything dangerous out there, they're going to up and get themselves killed. You know that. [He's military, so he's probably seen plenty of exactly what she's referring to.]