Title: Spacecraft
Content: only for crewed spaceflight, and these are often called spaceplanes. The first example of such was the North American X-15 spaceplane, which conducted two crewed flights which reached an altitude of over 100 km in the 1960s. The first reusable spacecraft, the X-15, was air-launched on a suborbital trajectory on July 19, 1963. The first partially reusable orbital spacecraft, a winged non-capsule, the Space Shuttle, was launched by the USA on the 20th anniversary of Yuri Gagarin's flight, on April 12, 1981. During the Shuttle era, six orbiters were built, all of which have flown in the atmosphere and five

Title: Single-stage-to-orbit
Content: Company, which was a concept for an expendable booster stage which could deliver a payload to orbit in one stage. A reusable version named ROOST was also proposed. Another early SSTO design was a reusable launch vehicle named NEXUS which was designed by Krafft Arnold Ehricke in the early 1960s. It was one of the largest spacecraft ever conceptualized with a diameter of over 50 metres and the capability to lift up to 2000 short tons into Earth orbit, intended for missions to further out locations in the solar system such as Mars. The North American Air Augmented VTOVL from

Title: Reusable launch system
Content: in the early 20th century. Many private companies competed, the winner being Scaled Composites with their reusable HTHL SpaceShipOne. It won the ten million dollars, by reaching the Kármán line twice in a two-week period. While SpaceShipOne is suborbital like the X-15, some hope the private sector can eventually develop reusable orbital vehicles given enough incentive. SpaceX is a recent player in the private launch market succeeding in converting its Falcon 9 expendable launch vehicle into a partially reusable vehicle by returning the first stage for reuse. In 2012, SpaceX had started a flight test program with experimental vehicles Grasshopper

Title: Hopper (spacecraft)
Content: single test flight of the Phoenix was conducted at the North European Aerospace Test range in Kiruna, Sweden. From the 1980s onwards, there was growing international interest in the development of reusable spacecraft; at this time, only the superpowers of the era, the Soviet Union and the United States, had developed this capability. European nations such as Britain and France embarked on their own national programmes to produce spaceplanes, such as HOTOL and Hermes, while attempting to attract the backing of the multinational European Space Agency (ESA). While these programmes ultimately did not garner enough support to continue development, there

Title: Space Shuttle
Content: to the X-20 was built several years later and delivered to NASA in January 1966 called the HL-10 ("HL" indicated "horizontal landing"). In the mid-1960s, the U.S. Air Force conducted classified studies on next-generation space transportation systems and concluded that semi-reusable designs were the cheapest choice. It proposed a development program with an immediate start on a "Class I" vehicle with expendable boosters, followed by slower development of a "Class II" semi-reusable design and possible "Class III" fully reusable design later. In 1967, George Mueller held a one-day symposium at NASA headquarters to study the options. Eighty people attended and

Question: What was the world's first reusable spacecraft called?
Answer: Space Shuttle