selected
The Lockheed SR-71 Blackbird, the United States Air Force's long-range, Mach 3+ strategic reconnaissance aircraft and the world's fastest air-breathing manned aircraft, made its first flight.
Related Wikipedia articles
Lockheed SR-71 Blackbird
US Air Force supersonic aircraft, 1964–1998
The Lockheed SR-71 "Blackbird" is a retired long-range, high-altitude, Mach 3+ strategic reconnaissance aircraft that was developed and manufactured by the American aerospace company Lockheed Corporation. Its nicknames include "Blackbird" and "Habu".Source: Wikipedia (CC BY-SA)
United States Air Force
Air service branch of the U.S. military
The United States Air Force (USAF) is the air service branch of the United States Department of Defense. It is one of the six United States Armed Forces and one of the eight uniformed services of the United States. Tracing its origins to 1 August 1907, as a part of the United…Source: Wikipedia (CC BY-SA)
Mach number
Dimensionless quantity in fluid dynamics
The Mach number, often only Mach, is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Austrian physicist and philosopher Ernst Mach.Source: Wikipedia (CC BY-SA)
Reconnaissance aircraft
Aircraft designed to observe enemy forces and facilities
A reconnaissance aircraft is a military aircraft designed or adapted to perform aerial reconnaissance with roles including collection of imagery intelligence, signals intelligence, as well as measurement and signature intelligence. Modern technology has also enabled some…Source: Wikipedia (CC BY-SA)