The US must step up its game to maintain its place as the leader in space exploration. By all indications, China is poised to take this title, writes Leroy Chiao
원문출처 : https://www.cnn.com/2019/01/07/opinions/china-moon-landing-outpace-us-opinion-chiao/index.html
원문출처 : https://www.cnn.com/2019/01/07/opinions/china-moon-landing-outpace-us-opinion-chiao/index.html