Liberian Vice President Joseph Nyuma Boakai speaks at a discussion on "Empowering Africa's Youth: Lessons From Liberia" in Washington D.C., capital of the United States, Aug 4, 2014. A discussion on "Empowering Africa's Youth: Lessons From Liberia", a side event of US-Africa Leaders Summit, was held here on Monday. (Xinhua/Bao Dandan)