austraveller2017-05-08 05:14:35

http://edition.cnn.com/2017/05/07/us/air-force-x-37b-landing-trnd/index.html

(CNN)The Air Force's unmanned aircraft, X-37B, landed successfully Sunday morning at NASA's Kennedy Space Center -- but it didn't come down quietly. 

吐奶义夫2017-05-08 05:27:21
听说 X37B有两架,轮番上场。这次降落的是第二架
austraveller2017-05-08 05:42:07
今年下半年还要安排第5次飞行任务