I watched the first four or so episodes of this series, and have been catching some of the later episodes on an FX marathon that just ended.

Had a couple questions on the story lines:

What ever happened to Bo? The last I saw he met up with another amputee who was going to teach him how to run.

And what about Sergio and Anna? They were about to have an affair when some soldiers came to the door to tell her that her husband was dead. Talk about a way to kill the mood. Did they ever hook up?

No.

The last thing I recall about Bo was him confronting his father about the old man stealing his disability checks.

OK, that was the episode I saw. Must have been the last show of the series.