I want to preface this by saying that I am not a space expert. I'm just using my noggin here, but I think this is correct.
Here is a diagram taken from a NASA related website. It shows orbital tracks of the International Space Station.
spaceflight.nasa.gov...
There are variations in the orbital path. (Edit: Later posters in the thread point out that the ISS doesn't go over the same parts of the earth on
each orbit. Undoubtedly there is a technical jargon term for this kind of non synchronous orbit. However the most important point is that the
non-synchronous orbit of the ISS can be slowed or speeded up by raising or lowering it's altitude.)
To arrange to be over a certain place on earth at a given time they would only have to raise or lower the orbit of the space station, allowing it to
to come into line with a point on the earth (New York City), which they have the ability to do and have done (probably numerous times).
[edit on 30-11-2009 by ipsedixit]