Internal terrorism and external terrorism both pose a great threat, but terrorism carried out by the United State's own citizens can be much more harmful in the long run. My favorite quote about this is nerdy, but it's from Captain America: Civil War and is stated by the true antagonist of the movie, "An empire toppled by its enemies can rise again. But one which crumbles from within? That's dead... forever." We as a people can rally against an outside threat and rise from whatever they may do to us, but we become exponentially weaker if we must rally against those within our own borders. That's just kinda my opinion.
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When the river Nile flooded, water, mud and silt from the river was washed up over the river banks creating a fertile growing area. During the period of the flood the Egyptian farmers spent time mending and making tools and looking after the animals. Many farmers also worked for the pharaoh during this time building pyramids and temples.
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