Why would they wait so long to report this?
There’s almost nothing new in this.
We already knew 8 were sent from Tripoli. Now it’s confirmed they were mostly CIA and we’re told a little bit more on what they were doing.
But nothing of note in the big questions that continue to be asked.
Well, I don't know for sure. But, based on years and years of being BSed by the Washington Post, I'd expect that it took time for the editorial staff to examine the available facts and invent a plausible, difficult-to-contradict story that would help control the political damage to the Democrat administration.