Provide you a degree of efficiency and mobility, and it gives you less warning then do a liquid fuel rocket, but today have been moving this direction for years. it is another thing that we watch, because it reduces our warnings, if you will. but we have very good intelligence on north korea. >> president trump's former national security adviser john bolton offering his worst criticism yet of the overture to pyongyang. "we say it is unacceptable for north korea to obtain weapons, but it is more work toward a goal then a real policy at this point." saying that more than 20,000 troops "are immin...