SpaceX Falcon 9 rocket carrying the Crew Dragon spacecraft with two astronauts takes off from NASA's Kennedy Space Center in Cape Canaveral of Florida, the United States, on May 30, 2020. NASA and SpaceX launched Crew Dragon spacecraft from NASA's Kennedy Space Center in Florida on Saturday, carrying two American astronauts to the International Space Station (ISS). (Photo by Ting Shen/Xinhua)