11.   A New Scientist special report looks at what would happen if a passenger jet ploughed into a nuclear plant.

12.   But after four passenger jets were hijacked by terrorists, the insurers abruptly curtailed their coverage.

13.   But pulling off such a feat from a passenger jet poses challenges, both technical and economic.

14.   But now, after terrorists commandeered four passenger jets Tuesday in a devastating series of suicide attacks, pilots say they must fight back.

15.   But the system, which has been phased in over time, is now required on all airline passenger jets by the Federal Aviation Administration.

16.   But when the big passenger jets came into service, nearly all first-class intercity mail moved by air.

17.   Cargo planes and small passenger jets will also have to meet the guidelines.

18.   From any of these places, Lindh could then be transferred to an intercontinental passenger jet.

19.   In many passenger jets, steel cable is used to connect pilot controls with panels on the wings, known as ailerons.

20.   In Washington, Attorney General John D. Ashcroft said associates of the hijackers who used passenger jets as missiles last week may still be in the United States.