Visit to NATO by Warren Christopher, US Secretary of State to discuss the situation in Bosnia Brussels, Belgium 6 May 1993 Please credit NATO photos. Bilateral talks with the NATO Secretary General Manfred Wrner in the Private Office. (NATO Photo 845kb Ref. no.: 14134/22) US Secretary of State Warren Christopher making a declaration to the press before his departure. (NATO Photo 578kb Ref. no.: 14136/18a)