Why Doesn't This Iranian Revolution Rate Coverage?

Why Doesn't This Iranian Revolution Rate Coverage?
In the late 1970's, the Shah of Iran was overthrown by the Islamic revolution. Every night, we were treated to network coverage of Iranians chanting, "Death to America!"
It turned out that much of that chanting was actually orchestrated by the networks.
But now, Iran's on the brink of another revolution, but you'd never know it by watching CBS, NBC or ABC.
Why is that? Shouldn't it be of some interest if the second member of the Axis of Evil was about to fall?
The answer is obvious. But read this anyway.