41.   The secret tunnels are fun when the house is full of guests.

42.   The third tunnel is crucial for two reasons, according to city officials and outside experts.

43.   The tunnel had been open for eight years.

44.   The tunnel has been a long one.

45.   The tunnel is the one that was to become the superconducting super collider but was never finished because Congress cut its funding.

46.   The tunnel may have been the issue that provoked the fighting, but it should now be treated as a negotiable detail, not a matter of principle.

47.   The tunnel is a possible route for wastes coming from the Calvert Cliffs nuclear plant in southern Maryland, Berkley said.

48.   The tunnel itself is off-limits to pedestrians.

49.   The tunnels were positioned one on top of the other, which is something that is now being regretted.