OH Annie do you really not know how directing, producing, editing and cutting a programme goes? OK here's a brief summary. The journalist responsible has over all supervision of everything. So he will write the original proposal, then oversee who is interviewed and how these are shot. He will then pass the rough cuts to the film editors and allow them to cut, but he will certainly supervise the cutting and once again oversee everything. He will view the finished product and suggest any changes he thinks necessary- this sometimes involves reshooting and shooting things he thinks may help to put his point across.Only when he is happy and the product tells the story he wants it to will he sign it off. Hope this explains everything.
By the way I hope you don't think that John Ware was actually interviewing the people who spoke do you?. It's easier to shoot people alone and have questions asked by someone on the production team. You then shoot a few shots of him and cut them in. Even when you see an interview where there are regular shots of both people don't believe they are both there unless you see both at once in a shot. Shooting seperately and then cutting is how it's usually done!