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No it was not built by Egyptians
Obviously different people think different things about Stonehenge. Some people think it was an astonomical calendar, others a ritual/religious site and yet others think it was a UFO landing site. There is no absolute proof of what its original purpose was so you make up your own mind or just keep an open mind, its your choice.
I think it was the Saxons
You would think that it is a large number, but it is actually very few. Only a small number of archaeologists and heritage specialists are allowed to go to Stonehenge. Other people are kept about fifty metres away from it and do not get in.
they think it was built too keep the gods from diying
That is still a mystery, but there are some theories. Some people think that it was used as a graveyard or as a temple to the gods. But what gods? And who could be buried there? No one is sure about that.
The Druids (Celtic preists) built Stonehenge as a place of worship. I think also think they used it to map out the night sky, or a place to conduct sacrifes at but i'm not 100% sure on that
I think they called them Barbarians (i think)
because the romans used their really good weapons
It was destroyed because of the newmatic bomb wich killed thousands of people and destroyed millions of homes I think.
The airport that was destroyed was not a major one, I think the country's two biggest airports are in Tokyo and Oasaka(?) and they were fine.
Romanes are not exist. I think you meant Romans. They are people like Greeks , but they were really ratification then the Celts (English people).