1.   In the world of airplane crashes, private companies often participate in investigations and run tests on recovered pieces of wreckage if requested by the government.

2.   Kalstrom said that investigators had not found any clear physical indicators of a bomb on recovered pieces of metal.

3.   Norris said the detective went out of state to track down the most minute clues and recovered key pieces of evidence.

4.   Piece by recovered piece, a gargantuan three-dimensional jigsaw puzzle is slowly being assembled in a hangar in Calverton, N.Y.

5.   The recovered pieces of the jumbo jet have been reassembled in a hanger in Calverton.

6.   Mechanical engineers continue to scrutinize, among other things, the recovered pieces of the center fuel tank.

7.   The recovered pieces will then be taken to Canadian Forces Base Toronto.

8.   The newspaper said that some recovered pieces of the center fuel tank show little damage, leading investigators to conclude that the initial explosion started somewhere else.