21.   Only one man, Timothy McVeigh, has been charged with actually driving the truck bomb up to the building and touching it off.

22.   One reportedly sold the delivery van used by the terrorists as a truck bomb.

23.   Other Kenyans who say they witnessed the blast offer a similar account of a truck bomb.

24.   Or craft a truck bomb to shatter the Oklahoma City federal building.

25.   Parking will be prohibited on the streets surrounding the building to prevent another truck bomb.

26.   She suspects she was in the same handicapped parking spot where the truck bomb exploded.

27.   That common-sense step would have made the buildings less vulnerable to a powerful truck bomb.

28.   That was just what McVeigh intended when he drove a truck bomb to the Alfred P. Murrah building.

29.   The documents are as mundane as a grocery list and as chilling as notes for the proper positioning of a truck bomb.

30.   The fear of truck bombs has led the FBI, the Department of Transportation, and scores of trucking companies to take measures to curtail any such threat.