VisualizeYellow River and Yangtze River through youtube

A Journey Down the Yellow River:    http://www.youtube.com/watch?v=tl_SxeDrazc
Yellow River Blue:   http://www.youtube.com/watch?v=g4EnYwuWY6Q
The Strategic Importance of the Yangtze River:  http://www.youtube.com/watch?v=QD0uitcdDWQ
China's Mega Dam in Yangtze River:   http://www.youtube.com/watch?v=P4FRO1eYdgQ
The largest dam in the world:  http://www.youtube.com/watch?v=b8cCsUBYSkw