The word 'airspaces' is correct and usable in written English.
You can use it to refer to the areas of the sky in which aircraft are allowed to fly. For example, "Airspaces are regulated by the Federal Aviation Administration."
How could something so tragic happen in one of the most controlled airspaces in the world?
The next generation of variable-wing bombers, such as the U.S. B-1 and the Soviet Tu-26 Backfire, were designed to avoid more sensitive electronic warning systems by penetrating enemy airspaces at extremely low altitude.
If the force of surface tension is responsible for the adherence of parietal and visceral pleurae, it is reasonable to question what keeps the lungs' alveolar walls (also fluid-covered) from sticking together and thus eliminating alveolar airspaces.
This is the main concern – especially as Russian aircraft and submarines continue to violate national airspaces.
In the end, the high seas course was adopted, thanks to the Russians effectively scuppering themselves by launching Sputnik 1 in 1957, which crossed other states' airspaces as it orbited the Earth.
The importance of aerial reconnaissance and artillery spotting (particularly the latter) made it clear that the belligerent able to deny the enemy use of airspaces above the battlefield would enjoy enormous advantages.
A November report by a British thinktank noted a rise in close military encounters between Russia and the west this year, including "violations of national airspace, emergency scrambles, narrowly avoided mid-air collisions, close encounters at sea, simulated attack runs and other dangerous actions happening on a regular basis over a very wide geographical area".
It has since never come back to UK airspace.
Hughes, 61, spoke as he returned to his home in Florida to await prosecution on charges of violating national airspace and operating an unregistered aircraft.
The deal is likely to further anger the US, which has been trying to persuade Iraq to stop allowing Iranian arms supplies from reaching Syria via its airspace.
There was also a lengthy discussion about whether Pakistan, which publicly decries the drone campaign despite signs that it continues to give tacit approval, should attempt to shoot down US drones in its airspace.
