November 23, 1997:

DPRK energy delegation at Nautilus Institute for briefing on "Potential for Energy Efficiency in the DPRK -- A Rough Estimate." From left: Choe Chol-Jung; Hwang Ha-Yong; Nautilus Associate Dr. David von Hippel, presenter; delegation leader Choi Chang-Hun; Nautilus Co-Executive Director Dr. Peter Hayes; Nautilus Associate Dr. Jim Williams; Jon Song-Myong; Mun Sok-bul.
(For titles of delegates, click here).