1. That altitude is above the approved limit for a Boeing 777-200.

2. In some cases, the planes appear to be the same altitude as the drone.

3. Finding life at high altitude in the atmosphere of a planet would make sense.

4. When clouds are at a certain altitude, some of the water particles inside freeze.

5. We ended our exploration of high altitude UAVs for internet access shortly after.

6. This includes actual location, altitude and direction and for humans, it would be extremely useful.

7. Those limitations include flight at an altitude of no more than 400 feet above ground level.