Sometimes he reaches agreement with one leader, only to see a more senior figure appear and reject the deal, forcing him to start over. He leaves nothing to chance. Some convoys take days to negotiate.
"You get tired. You lose your voice. You lose your temper. Sometimes you get emotional. Sometimes it's, 'Sorry, no, today you can't do that.'
"Each time, you have to keep negotiating. We tell them if you don't allow us access, people will die. We tell them, 'Imagine if this was your mother, imagine if this was your child.' We tell them we are doing this for humanity."
When he plays with refugee children, or helps a starving child, his fatigue and hopelessness lift, at least for a while.