China Internet Security Conference kicks off in Beijing (3)

Keith B. Alexander, first commander of the U.S. Cyber Command and former chief of the National Security Agency, speaks during the 2015 China Internet Security Conference in Beijing, capital of China, Sept. 29, 2015. A total of 120 experts from China, U.S., Israel, Australia, South Korea, etc. took part in the two-day conference that kicked off here Tuesday. (Xinhua/Li Xin)