From this experts chair, the only "denuclearization pledge" reached was.
Trump agreed to cease all provocations of NK, accept NK as a nuclear power and to turn a blind eye to sanction breaches by China and Russia.
https://edition.cnn.com/2018/06/27/p...eat/index.html
At least it was explained to Trump that stopping his insults and provocations via twitter... has made the world a safer place for today.
This negotiation was never going to be an overnight thing, Trump got his hand shake... wooop woop. Watch him rinse and repeat it with Putin, BFF!!!