Production wrapped on August 11th, 2002 after a brisk 11 day shooting schedule. The 90 or so effects shots, including an extended sequence in the year 2042, took over two years to complete.
The film was mixed at Skywalker Sound (division of LucasFilm). Sound effects, music insertion and audio corrective processing was all completed there.
The day the production was scheduled to film at the Presidio (near the Golden Gate bridge) was immediately after a terrorist plot to blow up the bridge had been foiled. The production crew was met by armed soldiers and had they not been able to show the proper permits (which they had), would have been immediately closed down.