A purebred beagle. A purebred dog typically refers to a dog of a modern dog breed with a documented pedigree in a stud book and may be registered with a breed club that may also be part of a national kennel club. Purebred dog may also be used in a different manner to refer to dogs of specific dog types and landraces that are not modern breeds.
The SpaceX reusable launch system development program is a privately funded program to develop a set of new technologies for an orbital launch system that may be reused many times in a manner similar to the reusability of aircraft.
There is a general feeling within the company that this is an important launch for SpaceX, as it will be the third national security mission, and if successful it would validate the company as a major player to meet the country's military launch needs at a time when the US Congress is pushing the Air Force to rely on US made rocket engines.