1.   An alert employee opened it to find shrivled pornographic pictures, and forwarded it to state police.

2.   An alert employee of the germ bank, American Type Culture Collection of Manassas, Va., notified the federal Centers for Disease Control and Prevention in Atlanta.

3.   Black humor kept alert employees who have worked nearly around the clock.

4.   Even Sprint has seen callers try the scam, but alert employees declined.

5.   Then, a sensor designed to alert employees failed or was ignored.

6.   TRW spokesman Gary Klasen said the company had hoped to avoid a shutdown and felt it would be premature to alert employees.