如果朝鲜在1999年5月美国特使威廉·佩里​​访问平壤后及时回访，那么比尔·克林顿总统对朝接触政策可能已经升级为外交关系正常化的努力。
If North Korea had reciprocated in a timely manner following US envoy William Perry’s visit to Pyongyang in May 1999, President Bill Clinton’s policy of engagement with the North might have been upgraded to a push for normalization of diplomatic relations.