What do you want to do when you've finished? thesis papers The Solar Impulse, its four propellers driven by energy collected from 12,000 solar cells in its wings that simultaneously recharge batteries for night use, departed Dulles International Airport outside Washington at 4:46 a.m. EDT, organizers said. 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])