They both use technology to change the lives of the main characters
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this is a personal question. Think of a time that you were scared but refused to quit; that is what bravery means.
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because they wanted to make a better living. Others received letters from friends or family members who had moved west. These letters often told about a good life on the frontier. The biggest factor that pulled pioneers west was the opportunity to buy land.
Gulf war . Korean nuclear power plant . Syrian refugees problem international conflict
A hostile meeting of opposing military force in the course of the war