In these moments there is no posing. The photographer becomes like a fly on the wall, shooting the events as they unfold, capturing raw emotions as their subjects don't even realize they are being photographed.
In a journalistic photo, you can see the story, you can feel the emotion. It is not a quick snapshot or a candid photo.
There is a lot of thought and reasoning behind a journalistic photo. The photographer is conveying a message to you through the image.