Somebody (I forget who) once said that there are three reasons for Congressional hearings:

1. To get Congressmen on television
2. To get Congressmen on television
3. To get Congressmen on television

Having sat through a number of painful examples in the past of congressmen bloviating, bullshitting, posing, posturing and generally behaving like narcissistic, attention-whoring wankers at these hearings, I have to concur with this viewpoint, and I remain profoundly skeptical that anything useful and/or truthful will emerge from the Benghazi hearings. These hearings are usually convened for one of two purposes:
(a) to pick on a bunch of people who have been (for the time being) declared to be Bad Guys, who therefore need to be excoriated in public
(b) to score political points against the minority party in the House.