ian16th
17th Apr 2015, 10:29
US Navy's X-47B successfully completes first ever unmanned refuelling test in mid-air | Daily Mail Online (http://www.dailymail.co.uk/sciencetech/article-3042861/The-drone-never-land-Navy-s-X-47B-successfully-completes-unmanned-mid-air-refuelling-test.html)