ROANOKE TIMES 
                      Copyright (c) 1996, Roanoke Times

DATE: Saturday, September 21, 1996           TAG: 9609230065
SECTION: NATIONAL/INTERNATIONAL   PAGE: A3   EDITION: METRO 
DATELINE: WASHINGTON 
SOURCE: ASSOCIATED PRESS


TWA RESIDUE MAY BE LEFTOVER OF DOG TRAINING

A month before the crash of TWA Flight 800, the airliner was used to train bomb-sniffing dogs, and the explosives in those exercises could explain the traces of chemical residue found on the plane, a government official said Friday.

Investigators have been stymied for weeks in determining exactly what caused the plane to plunge into the Atlantic Ocean July 17, killing all 230 people on board.

Traces of chemicals often used in bomb-making have been found. But investigators say they have not gathered enough evidence to conclude that the plane was brought down by a terrorist act.

A federal official familiar with the investigation said on Friday that in June, as part of a routine training exercise, the TWA plane was used as a testing ground for bomb-sniffing dogs.

``It was this plane, and the test bombs contained explosive material,'' said the official.

While real explosives were used in the tests, it was not immediately clear whether the materials match the chemical residue found on the floor in the plane's midsection and on a curtain from the rear cargo hold.

``We still don't know whether we have a match'' between the explosive residue and the bombs used in the training exercise, the official said.

The exercises were conducted while the Boeing 747 jetliner was at the St. Louis airport, another source said. He added that local police told the FBI all of the test packages with explosive chemicals were removed after the exercises.

``At this point, there would be no reason to rule out the possibility of a bomb, based only on this development,'' a third federal official cautioned. All three officials spoke on the condition they not be identified by name.


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