We will probably not hear from Helen soon. CNN has reported that the tunnels and bridges out of NYC are all closed. No note about when they will be allowed to open again.

As to crashes. They report a total of four flights. The two Trade Tower flights, the Pentagon and the flight that crashed in Pensilvania. Apparently, on the latter, a passenger was hiding in bathroom and was in contact with emergency operators until crash. He said plane was being hijacked.