
A front view of the Tupolev Tu-144LL supersonic flying laboratory at the Zhukovsky Air Development Center near Moscow, Russia.

The Tupolev Tu-144LL lifts off from the Zhukovsky Air Development Center near Moscow, Russia, on a 1998 test flight.

The Tupolev Tu-144LL supersonic flying laboratory shows off its sleek lines in a low-level pass over the Zhukovsky Air Development…

The delta wing of the Tupolev Tu-144LL supersonic flying laboratory is evident in this view from underneath the aircraft during…

NASA Research pilot C. Gordon Fullerton sits in cockpit of Tu-144LL SST Flying Laboratory.

Life Support Technician Bobby McElwain assists German pilot Kieran Kim before a flight of the X-31 Enhanced Fighter Maneuverability Demonstrator.

Viewed in this 1955 photograph is the NACA High Speed Flight Station D-558-II #2 (144) Skyrocket, an all-rocket powered vehicle.…

High-Speed Research Station Director Walter C. Williams, NACA pilot A. Scott Crossfield, and Director of Flight Operations Joe Vensel in…

Left to right: F-104N #812, F-15A #287, and YF-17 #569 in formation.