1.   About three dozen protesters, clad in black, did turn up at the rally, some wearing masks and carrying shields.

2.   Dozens of protesters, some wearing masks or holding up papier-mache devils, remained on the floor of the Congress for hours.

3.   A man, apparently a hijacker, seen at one point by a reporter at the door of the aircraft was dressed in black and wearing a mask.

4.   The gunman, dressed in black and wearing a mask of some sort, fled on foot.