Frontline seriously puts out some real quality stuff. I watched this a couple months ago and it's top notch as usual.
I remember back in 2007 or so they had an amazing documentary on uninsured persons with life-threatening chronic illnesses. That's another one that stands out in my memory.
Frontline is the only thing on PBS I care to watch. I really haven't liked a lot of their recent work, but the body of work as a whole is outstanding.