Shuttle/ISS docking question

Katipo wrote:
Something I have always wondered...

Why is it, that after a shuttle docks with the space station, it takes
nearly two hours for them to get around to opening the hatches?

Because they'd prefer to *verify* a good mechanical and pressure seal
to prevent themselves and/or all of their air from accidentally being
blown into space.

Seems like a good idea to me.

Lee Jay