ghostnav,
We would never have any kind of mandate from the world community to go into Zimbabwe. In the case of Libya there is overwhelming UN support (NO vetoes) the Arab League has called for a no fly zone and action to protect the Libyan people. This is different, it's a start. It just COULD be the start of a common end to every mad dictator who decides to kill his people. It could even be the beginning of the end for dictators.