At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
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I believe that the costs of the Korean war were justified because the US wanted Communism to stop. Due to the fact they knew what the Soviet Union/North Korea had done to itself and the US just wanted to save the lives of South Korea. The US wanted to stop fascism in the Korean war and wanted to prove to the Soviets that we were better. Because North Korea was being supplied by the Soviets and the South by us the US and Soviet Union were in a way at war.
I hope this is good enough.. :)