The ultimate goal is to have the Zephyr fly for months at a time, at high altitude (over 16,000 meters/50,000 feet, way above the weather). Built of lightweight materials, earlier Zephyrs weighed only ...

It will be redeployed to fly over the Pacific Ocean and carry a prototype of a new weapons payload system. When exactly that will be is unclear, since the Zephyr just keeps flying instead of ...