>> reporter: they've been preparing basically since the fighting began, anderson. they've been digging up, as you saw in that report, digging up stones to use for ammunition. barricading the entrances to this place and trying to keep morale up, swearing they're going to fight back. the sound of the picks digging into the asphalt all night, it's uncanny, as well as the sound of the wounded and the prayers. i can only compare it to perhaps a medieval siege would have sounded like around a castle. >> i was thinking about roman times when the demonstrators created this shield made out of corrugated tin or steel as they advanced toward the museum. i'm trying to get an answer, and if anybody knows the answer to this, join in.