During the 2010s, the Northrop Grumman X-47B quietly achieved something many believed was still decades away. Designed as a stealthy carrier-capable combat drone, the aircraft successfully performed ...

NASA's X-59 quiet supersonic research aircraft is preparing for some of its most significant flights yet. The X-plane is about to begin a new block of test flights that will include its first time ...

Last year, National Security Journal traveled to see both of the two Boeing X-32 aircraft that still exist. One sits indoors ...