The U.S Air Force’s highly secret unmanned space plane was supposed to stay in space for nine months, but it’s now been there for a year and three days – and no one knows what it’s doing.
The experimental craft has been circling Earth at 17,000 miles per hour and was due to land in California in December.
However the mission of the X-37B orbital test vehicle was extended – for unknown reasons.
The plane resembles a mini space shuttle and is the second to fly in space.
The first one landed last December at Vandenberg Air Force Base in California after more than seven months in orbit .... Read more at http://www.dailymail.co.uk
