You need to explain what happened to you so we can understand what happened to the others. Sometimes, the atrocities to which they have been victim or witness have been so terrible that they need to judge you as a person who can handle it. You don't want to put them in the position of having to help you. You need to be strong. If they can see that you can handle it they will see that they are not handling the destruction.
Relief comes about by sharing the burden.
If they can share this with you it becomes a strength. You are a North American who can possibly be trusted. They also need to know they have all the time that they need. You may have to block out all time after the appointment. Dr. Martinez had one interview which lasted seven hours.