and low altitude mountains in Taiwan.

Tonight, the US military shooting down another high-altitude, unidentified flying object.

The object was flying at an altitude of approximately 40,000 feet, had unlawfully entered Canadian airspace, and posed a reasonable threat to the safety of civilian flight.

Altitude data from FlightRadar24 shows the aircraft was thrust up and down over the course of a minute.

At one point, it reached about 400ft or 120 meters above its original altitude, before dramatically dropping back to cruising altitude of 37,000ft.

different missiles to attack in different altitude bags.

If we are running at altitude ─ high up

Finn: Altitude training, isn't it?

"Ladies and gentlemen as you may have noticed we have reached our cruising altitude currently sitting at 23 000 feet above sea level.

Please note we will be flying at a higher altitude to alleviate the problem.

so far? The answer is an airplane. You know, as you gain altitude there's less atmosphere

But as it rises, the temperature starts to drop again, because the atmosphere gets cooler as you go higher - by roughly one degree centigrade for every 100m of altitude.

as you go higher - by roughly one degree centigrade for every 100m of altitude.

It was isolated but also protected by its altitude and surrounding geography.

but also protected by its altitude and surrounding geography.

parachutes as they come out. So we will be at an altitude that when the ORION capsule