1.   Hahn said the engineers often entered the basement through access hatches on West Street that led down to the PATH tubes.

2.   Installing a sump pump in the basement can help, but it will not prevent water from entering the basement.

3.   Rainwater can also enter the basement by a more direct route.

4.   Several officers and soldiers who entered the basement said the thieves who swept through had acted as if they were raiding a tomb.

5.   The assailants entered the basement as several hospital workers stood in line to cash their checks on payday, said Ori Pagovich, a hospital spokesman.

6.   Water can enter the basement by coming up from below.