That's the big brother. The 38 is a little smaller. Another angle - https://www.dfrc.nasa.gov/Gallery/Photo/X-38/Large/EC97-44105-29.jpg
That's the big brother. The 38 is a little smaller. Another angle - https://www.dfrc.nasa.gov/Gallery/Photo/X-38/Large/EC97-44105-29.jpg
But what is X37-b doing?