I was aware of the captive(s) at the time of the attack, but I assumed that they were taken in as they were the attackers.
When I heard PB's speech, I got the impression they were prisoners that were being held well before the attack took place and were the reason for the attack its self.
Gack!! I'm confused!
Broadwell told a Denver audience in October: “Now I don’t know if a lot of you heard this, but the CIA annex [to the consulate] had taken a couple of Libyan militia members prisoner and they think that the attack on the consulate was an effort to try to get these prisoners back.”
I read that the attack may have been two-phased; the consulate for Stevens and later the annex for the prisoners.