Joseph Kony is a Ugandan guerrilla group leader, head of the Lord's Resistance Army (LRA).
Kony 2012 is a campaign by the nonprofit cause Invisible Children. It tries to show the problem of using children soldiers.
Invisible Children say: "KONY 2012 is a film and campaign by Invisible Children that aims to make Joseph Kony famous, not to celebrate him, but to raise support for his arrest and set a precedent for international justice."
According to Wikipedia and other sources, in 2005 Kony was indicted for war crimes by the International Criminal Court at the Hague, but has succeeded in evading capture since.More on Kony at http://en.wikipedia.org/wiki/Joseph_Kony