Until Sept. 11, these materials were considered, at worst, potential environmental or safety hazards in the event of an accidental release.

Land contamination may also be caused by current operations or accidental releases of substances to the environment.

A primary concern is the accidental release of these redesigned organisms.

They pretended it was an accidental release, caused by missing air filters.

The only question now is whether the accidental release happened on purpose.

It will merely prevent, shall we say, accidental release, until you have gained the proper control of yourself.

The Army says it is not its duty to protect residents in an accidental release.

The well spilled for three months, causing the world's largest accidental release of oil into marine waters.

"But the danger of accidental release always exists," Wayne said.

These tracks are extremely similar, if not identical, to the alternate, accidental 1991 release.