21.   Civil defense sirens blared across Baltimore as firefighters donned oxygen masks to enter the tunnel.

22.   Firefighters were forced to enter the tunnel, blocked by tangled rail cars, six at a time through a manhole in the street.

23.   For reasons still unclear, the man apparently entered the tunnel sometime over the weekend on the English side, police said.

24.   French police said the man, not identified by name, entered the tunnel sometime over the weekend on the English side of the Channel.

25.   French Transport Minister Bernard Pons told the National Assembly on Tuesday night that the freight truck was already on fire before entering the tunnel on the French side.

26.   Forensic investigators and eyewitnesses have suggested the cable car may have been experiencing some sort of technical problem before it even entered the tunnel.

27.   French Transport Minister Pons told the National Assembly on Tuesday night that the freight truck was already on fire before entering the tunnel on the French side.

28.   Hours later, inspectors entered the tunnel, and planned to travel the entire length by foot.

29.   However, several heavy trucks entered the tunnel from the Italian side.

30.   Japanese superstition holds that by entering the tunnel under construction, women would arouse the jealousy of the mountain goddess, and cause disaster.