
Dan Mote, president of the U.S. National Academy of Engineering, speaks during the 2nd Global Grand Challenges Summit (GGCS2015) in Beijing, capital of China, Sept. 15, 2015. The summit kicked off here on Tuesday. (Xinhua/Jin Liwang)

Dan Mote, president of the U.S. National Academy of Engineering, speaks during the 2nd Global Grand Challenges Summit (GGCS2015) in Beijing, capital of China, Sept. 15, 2015. The summit kicked off here on Tuesday. (Xinhua/Jin Liwang)