Pentagon Officers to Change Lightbulb

Q: How many Pentagon procurement officers does it take to change a lightbulb?
A: Look, for only $87 billion, we can put up this chain of fluorescent satellites that will illuminate the whole planet.

Borg to Change Lightbulb

Q: How many Borg will it take to change a light bulb?
A: None, they just assimilate the bulb.

Punk Rockers to Change Lightbulb

Q: How many punk rockers does it take to change a light bulb?
A: Two: One to screw in the bulb and the other to smash the old one on his forehead.