11.   I expected conventional explosives, and it has been the H-bomb.

12.   If the United States is lucky, the various violent groups with grievances against the American government and society will continue to think up schemes using conventional explosives.

13.   Just one of the old wooden structures remained, the building where the conventional explosives portion of the first bomb, known as Trinity, was put together.

14.   Not a nuclear bomb, but conventional explosives combined with radioactive material exploding to produce a deadly radioactive cloud in a crowded location.

15.   Older bombs use a ball of atomic fuel surrounded by a cumbersome array of conventional explosives that compress the fuel until it reaches critical mass.

16.   One, the dirty bomb, would use a conventional explosive to disperse a radioactive material to sow terror and cause health problems like cancer.

17.   One, the dirty bomb, would use a conventional explosive to disperse a radioactive material to sow terror and cause health problems, including cancer.

18.   Rather, the materials would be spread using conventional explosives in so-called dirty bombs.

19.   Removed from shielding, they weigh a few pounds, but would emit enough radiation to kill a terrorist before he could attach it to conventional explosives.

20.   Scientists are currently building thrusters comprising a silicon chip with an array of holes packed with conventional explosives.