How do I tell a button to move my camera!?

I have a series of buttons, each of them represent a specific part of a machine. I need to set it up so that when the user clicks a button, the camera smoothly flies to that particular part, looking at that part, no matter where it started from. This way, the user can select any button/camera position, then click any other random button, and the camera will fly to that part, from where it was.

Basically what I need to know, is what script should I have for a button, that tells the camera to smoothly fly to a point, and look at that point, from any starting position.

Thank you guys for any and all help you can give!