1.   But it has since created a stalemate by refusing South Korean reactors.

2.   But North Korea has refused South Korean reactors, saying they are unsafe.

3.   But the North has endangered the deal by refusing South Korean reactors.

4.   By refusing South Korean reactors, the North is driving the United States into a corner.

5.   It has since refused South Korean reactors, calling them unsafe.

6.   North Korea cites safety reasons for refusing South Korean reactors, but it is believed to be acting out of national pride.

7.   North Korea refuses South Korean reactors for technical and political reasons.

8.   North Korea cites safety reasons for refusing South Korean reactors but is believed to be acting out of national pride.

9.   North Korea cites safety reasons for refusing South Korean reactors, but experts believe the real reason is national pride.

10.   North Korea is believed to be refusing the reactors from its rival out of pride.