Guy could be Paul Ziffren
Maybe you find other names from image description
https://digitallibrary.usc.edu/asset-management/2A3BF1O3ZPF4E?FR_=1&W=1600&H=800
https://www.gettyimages.pt/detail/fotografia-de-not%C3%ADcias/democratic-workshop-conference-in-pacific-fotografia-de-not%C3%ADcias/1048760450?adppopup=true