Brian Williams lost his job as anchor of the NBC Nightly News for perpetuating one fiction, and for failing to perpetuate another. The first fiction you're probably familiar with. Last winter, Williams was caught for having repeated a tall tale about his experiences embedded with U.S. troops on a helicopter in the 2003 Iraq War.
If you are Rh-, then you are - - (one negative came from mom and one from dad). If both parents are Rh+ and have mixed genes (+ -), then it is possible that each of them will give the - gene to their child, making the child Rh- (- -). So, to answer your question. Two Rh+ parents can have an Rh- child.....
If a woman has a negative Rh factor and her partner has a positive Rh factor, she is considered to be at risk because it can cause the baby to become Rh positive. During pregnancy, the blood supplies of the fetus and the mother are separate, but there are instances it can be passed through to the child.