Answer and Explanation:
Alberto Rios, in his poem "The Border: A Double Sonnet" describes what a border is. Among the several metaphors he uses, he mentions:
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The border is a real crack in an imaginary dam.
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The border is a place of plans constantly broken and repaired and broken.
Speaking of broken things contributes to the poem's theme. A border should be nothing more than that, an imaginary line. A border is an idea, a sense we have of being at different places. However, people, governments, politics have transformed the border into something else. It has gained importance, becoming a barrier to people and their dreams. A border breaks people's plans, takes away their opportunities, kills their hopes by keeping them out. A border - again, nothing but an imaginary line - is given the power to destroy when it is given power to keep people out.