The National Aerospace Plane(NASP) is a horizontal takeoff and landing, single-stage-to-orbit vehicle.

空天飞机（NASP）是水平起飞、着陆的单级入轨飞行器。

youdao

The agency has already spent billions of dollars on the National Aerospace Plane, the X-33, X-34, X-37, X-38 and the Orbital Space Plane.

FORBES: Magazine Article

Second, and related to the first, the National Aerospace Plane can contribute greatly to reestablishing U.S. preeminence in space, for civilian as well as military purposes.

CENTERFORSECURITYPOLICY: The National Aerospace Plane

Latest example of NASA bloated spending: The agency has already spent billions of dollars on the National Aerospace Plane, the X-33, X-34, X-37, X-38 and the Orbital Space Plane.

FORBES: Magazine Article