We used to work together <a href=" http://www.academicpresseurope.nl/?spm-english-essays#resemble ">research paper types</a> Orion will be ready to fly before the SLS is up and running. Orion's first test flight is scheduled to take place in 2014, when NASA will use a Delta 4 Heavy to send an uncrewed Orion out to a distance of 3,700 miles (6,000 kilometers) from Earth — farther than any spacecraft built for humans has traveled since the Apollo program ended in 1972.