After a summer swoon, you would think that the evening newscasts of the Big 3 networks would start to recover a bit now that many Americans are back from vacations, kids are back in school, and fall routines are getting established or re-established. So far, you would be wrong. It's early, and there's still plenty of time this fall to recover, but during the time period after Labor Day, the broadcasts primarily anchored by Brian Williams at NBC, Charles Gibson at ABC, and Katie Couric at CBS: Are down a combined 28.5% from their peak in late January during...