People go to visit the European Space Expo during the opening day in central Athens, capital of Greece, on March 28, 2015. The expo displays how outer space and relevant applications provide benefits to European citizens. (Xinhua/Marios Lolos)
Photo taken on March 28, 2015 shows a view of the European Space Expo during the opening day in central Athens, capital of Greece. The expo displays how outer space and relevant applications provide benefits to European citizens. (Xinhua/Marios Lolos)