NPT was signed in 1994 in exchange for food aid. If Norks talked missile tech with Pelosi in 1997 when she was there they violated their agreement
https:// www.armscontrol.org/factsheets/agreedframework
Bolton on Nork agreement:
“Rather than confront the North Koreans and demand they halt their efforts to create a uranium enrichment capability, the intelligence findings gave those in the Bush administration who opposed the Agreed Framework a reason to abandon it. John Bolton, then- undersecretary of state for arms control and international security under President Bush, later wrote that “this was the hammer I had been looking for to shatter the Agreed Framework.””
https:// www.armscontrol.org/factsheets/agreedframework
The Agreed Framework was in place during Pelosi’s visit in 1997:
http:// articles.latimes.com/1997/aug/14/news/mn-22317