21. Arion 1 was originally proposed as a two-stage rocket capable of achieving suborbital flight. 22. The operation here makes upper-stage rockets and turbopumps for the space shuttle's main engine. 23. SLV is a four stage rocket with all solid-propellant motors. 24. During the academic year 1961-1962, HCRS worked on two-stage rockets , and improved the design. 25. North Korea fired a multi-stage rocket over Japan last August. 26. Topics will include North Korea's firing a multi-stage rocket over Japan last August, it said. 27. It was launched from Esrange in Sweden in 2009 . It was a two-staged rocket . 28. In August, the North launched a three-stage rocket over Japan, catching American intelligence by surprise. 29. The Snoopy mission is encouraged by the 2002 re-sighting of the Apollo 12 third-stage rocket . 30. It was a 2-stage rocket , and flew 4 times.
