If the flag of an armed enemy of the U.S. is allowed to fly over government buildings, then it implies that slavery, or at least the threat of slavery, is sanctioned by that government and can still legally exist.
“Al Qaeda has significance beyond its numbers, frankly. And so for us, our 24-hour-a-day objective is to seek out those al Qaeda cells. And, as we seek them out, to target them and eliminate them. And we're doing that 24 hours a day.”