The government studied proposals for a manned, hypersonic, stealth spy plane capable of traveling at a speed of up to mach 5.

The cesium additive enabled what has been described as "plasma stealth," which essentially ... launched no less than six missiles at the spy plane, which was reportedly flying with a speed of ...

The plane represents a leap ahead in stealth technologies and is designed to partner with a new fleet of drones, giving it more combat punch and surveillance capabilities to evade radars as it ...

The F-117 Nighthawk was developed in response to the US' need for a jet that could operate completely undetected by the enemy.

As Washington and Beijing race to produce the world’s first-ever sixth-generation aircraft, new records surrounding speed, weapons load, stealth ... s need for a new spy plane.