World Health Day 2010
China's Margaret Chan, Director-General of the World Health Organization WHO, speaks during a press briefing about the launch of World Health Day 2010 Urban Health Matters at the World Health Organization (WHO) headquarters, in Geneva, Switzerland. World Health Day 2010 will focus on health in big cities. With the campaign "1000 cities - 1000 lives", cities will be encouraged to open up streets for healthy activities. AP Photo/Keystone/Martial Trezzini
