All this might have been an acceptable cost for achieving the U.S. goal: to get Kim to commit specifically to shedding his nuclear weapons within a reasonable time frame, in a verifiable fashion. But, on this, Trump failed big time: The joint statement that emerged from the summit included no such firm commitments, using vague language on denuclearization that is interpreted very differently by the two sides. "It does not meet the minimum requirements in terms of what we expected them to do," Ambassador Joseph Y. Yun, the former special U.S. representative to North Korea, told CNN.