The world community vowed "never again" after the 1994 Rwandan genocide and after atrocities of Srebrenica a year later. Then came Darfur.

When U.N. and world leaders were unable to stop the slaughter in Darfur, ordinary citizens stepped in and made a difference.

The Sudan-China relationship is an important factor in any possible solution to Darfur's humanitarian crisis. That's why activists have targeted it.

This U.N. doctrine states nations can't hide behind their sovereignty. If crimes against humanity occur, the world community can intervene -- with force if necessary.