1.   The past couple of years have witnessed an explosion in the number of neural network articles appearing in computer magazines.

2.   For the first time, Israel is witnessing an explosion of private wealth generated by foreign markets and foreign investment.

3.   If scholarly biography sometimes seems to be chasing ever smaller prey into the tangled recesses of history, popular biography and autobiography have witnessed an explosion of empty celebrity.

4.   Indeed, the last few years have witnessed an explosion of public criticism.

5.   Mrs. Morgan was among the thousands of spectators near the launching site in Cape Canaveral, Fla., who witnessed the explosion.

6.   Paul Begala, an aide to former President Bill Clinton, said he witnessed an explosion that sent an enormous orange fireball into the sky.

7.   Witness the explosion of horrifying polyester in current movies.

8.   Paul Begala, a Democratic consultant, said he witnessed an explosion near the Pentagon, saying it sent a huge, orange fireball skyward.

9.   Paul Begala, a Democratic consultant, said he witnessed an explosion near the Pentagon.

10.   An Associated Press photographer in Grozny witnessed an explosion that destroyed a Russian armored personnel carrier, apparently killing and wounding a number of soldiers inside.