Not a Person?

When talking to a representative of Illinois Senator Richard Durban, a group of teenagers and I asked why he felt abortion was acceptable. The reply was interesting. It goes back to the decision of Roe V. Wade. The court decision said that they did not know if it was a human person. Back then, we did not have sonograms, but now we do. We also know about DNA. Science proves today that the "thing" in the womb is a human being. So the question again is wheather or not the human being is a human person. In other words; "Is it sub-human?" Interesting.