Now I want you to meet somebody who is...well, he is what he is. And what he is, is--and you'll see this in the way he plays, the way he works, the way he loves, even the way he does his laundry--the man is an engineer, and such an engineer that if you were to look deep into his cells, down to the DNA where the rest of us have AAs and CCs and TTs and GGs he has, I haven't seen this, but I'm sure it's true, he has E-N-G-I-N-E-E-R. JAMES MCLURKIN: All right, let's, let's get this going. ROBERT KRULWICH: James McLurkin does not waste time. DARA BOURNE (James McLurkin's Girlfriend): James said to me, when we went out to dinner the first time, "I'm a geek."

February is Black History Month. In celebration of the contributions that African-Americans have made to science, we talked to three black scientists who are making history today with their groundbreaking work. Determination and passion are necessary for success in science, say James McLurkin, Martin Culpepper, and Hakeem Oluseyi. As children, they had something in common: They loved to figure out how things work. These three men also had determination, as well as strong support from their families and from teachers who believed in them.