11.   When properly mixed, the chemicals can produce an explosive more powerful than TNT.

12.   A Palestinian suicide bomber detonated a powerful explosive in an Ultra-Orthodox Jewish neighborhood in Jerusalem, killing nine people, including several children, police said.

13.   A truck carrying powerful explosives was found by the side of a road in the troubled Caucasus region of Dagestan, the ITAR-Tass news agency reported Sunday.

14.   Al Hindi said powerful explosives were planted under the stairway of the building.

15.   Alert to possible terrorist attacks, Macedonian police on Sunday stepped up their probe into two Albanians arrested in possession of a powerful explosive, a police spokesman said.

16.   Authorities seized a shipment of powerful explosives and weapons after a gunbattle Saturday with alleged Islamic guerrillas, who exchanged fire with police then fled into the dark.

17.   He then bought acids and agricultural chemicals needed to produce powerful explosives.

18.   He was charged with trying to bring powerful explosives and other bomb-making materials into the United States.

19.   He was charged with trying to bring powerful explosives and other bomb-making materials into the United States in his rental car.

20.   Hundreds of Palestinians clashed Wednesday with Israeli troops after the funeral of a Hamas activist killed when a car rigged with powerful explosives blew up.