Hollywood actor Matt Damon and Gary White, Co-Founder and CEO of Water.org, talk to NDTV's Prannoy Roy at the World Economic Forum in Davos about the seminal work their foundation is doing in the areas of water and sanitation. "Often young girls don't go to school because they are scavenging for water around the country... If you don't have clean water, the only thing that matters in your life is to find water. There is nothing else," says Damon. The actor also says it would be beneficial for the world if Donald Trump has a successful presidency. "A strong America would be good for the world," he tells NDTV.