Sirens and fire alarms were sounded in the building.
People exited down the stairs.
Announcements over loudspeakers told people to HOLD where they were at the time.
The lady speaking said they CHOSE to IGNORE and kept going down the stairs...they went to the Adams side of the building but the DOORS WERE LOCKED because it was after working hours...!!!
From NBC WMAQ TV 5 interview...
I just cannot understand the stupidity of those who insist on locking building fire escapes.