The 'incremental approach' the United States has taken to North Korean aggression until now hasn't worked, says Nikki Haley, the US ambassador to the United Nations.
US Ambassador to the United Nations Nikki Haley addresses the United Nations Security Council at the United Nations Headquarters in New York City, US, April 4, 2017.(photo credit: REUTERS/BRENDAN MCDERMID)ByMICHAEL WILNERUpdated: