21.   The package, with a return address of a Northwestern University engineering professor, was taken to Northwestern in nearby Evanston, where it exploded, injuring a guard.

22.   They wanted something new and pressed the engineering professor for an answer.

23.   While other engineering professors apparently had similar concerns, documents show, they did not pursue them.

24.   A footbridge at the Maccabiah Games collapsed because of structural problems, not because heavy police vehicles used it at one point, an engineering professor testified Monday.

25.   At Drexel, the news came as a surprise, said fellow engineering professor Bruce Eisenstein.

26.   At Drexel, the news came as a surprise, fellow engineering professor Bruce Eisenstein said.

27.   College engineering professors say they now focus their students on dam upkeep.

28.   Engineering professor Larry Goss can hardly wait for his son studying in Poland to get an electronic mail address through the university there.

29.   EVANSVILLE, Ind. -- Engineering professor Larry Goss can hardly wait for his son studying in Poland to get an electronic mail address through the university there.

30.   He returned to his alma mater, the California Institute of Technology and its Jet Propulsion Laboratory, as an engineering professor.