Answer:
The events of the 1980s and 1990s helped to maintain world peace were the Persian Gulf war, the Iran-Iraq war, Lebanon war, the bombing of Libya, and the last stage of the cold war.
Explanation:
These events were the major events that allowed world peace to be kept in between the 1980s and the 1990s, however, they did it because they threatened it. It is very complicated, but the reasons are that these weren't high scalation conflicts, they were local conflicts and didn't clash the major party's that could trigger a world conflict directly. They only participated indirectly, by providing support to the participating party's.
The primary responsibility of air traffic controllers is the separation of aircraft. They control traffic in and around airports and in the terminal and en route airspace in between. Controllers speak directly with pilots, notifying them of traffic or weather in there vicinity.
Roman Law Into Single volume