Though this article was written to answer liars like Charlie Rangel and Jessie Jackson, about the myth of minority-disproportion, there is an answer to your question contained in the text. It still applies today. You can read about it below. I would note as well that Donald Rumsfeld released data that said the same thing in response to public statements made by Rangel and others.
You misunderstand the point, vette: The disproportionate representation of blacks in the armed forces is a symptom of their poverty, and of their making up a disproportionate share of America's poor and working-poor. And that does not make America look good.