Transcript for Costly Rebel-Training Program Raises Questions About Effectiveness
David? Before the debate even begins. Tom llamas tonight outside the Reagan library. Let's get right to Jonathan Karl, because, Jon, some of the candidates have watched their through tonight. Reporter: It's not just their poll Numbers. It's the money, David. Some of the candidates H correspondent Martha Raddatz. Stunning Numbers, Martha, given the millions of dollars already spent. Reporter: They sure are, David. The jig fursfigures are draw-dropping. Take a look at the Numbers. The goal of this $500 million program? 5,400 trained fighters in the first year. So far, we have spent $42 million on the program. And as you said, just four or five trained rebels still in the fight. That's about $10 million per fighter. That's just incredible. Why is this going so poorly, Martha? Reporter: Well, vetting and training is extremely difficult. And there are no U.S. Troops with rebels once they're inside Syria. But clearly, the training is not working. One senator today called this a total failure. The military says they are trying to fix it. David? More though come on this. Martha Raddatz live in Washington. Martha, thank you.
This transcript has been automatically generated and may not be 100% accurate.