When you're just one person who wants to make a change in a world of 6 billion, effecting that change can be a little daunting. But for some people, waiting around for something to happen is a whole lot more worrisome.

Colombia native Hector Sierra was studying film in the former Yugoslavia when the Kosovo War started. The decades-old conflict between the Albanians and Serbians was intensifying again, and Sierra found himself thinking.

"What I had to do as a citizen, as an artist, was to try to help the victims of war in some way," he says. "After people have been fed, and have been healed or cured from whatever sickness, they have to be healed in their heart.