They say this has been confirmed by outside scientists with leading industrial gas and analytical firms who have produced confidential reports on their process. (news.nationalgeographic.com)
Since then, the facility has altered focus, putting more emphasis on weapons - related work and acting as a user facility for outside scientists. (sciencemag.org)
Indeed, armed conflict in that nation prohibits outside scientist from visiting to safely conduct any kind of field research. (sciencedaily.com)