I'd think with today's technology most of those shots would be straight from the camera. The photographers wouldn't have time to shoot an event in the one part of the world and email it to their editor on the other side of the planet and still be bang up to date with the news.
There may be a quick auto levels/contrast etc but i'm not sure they'd have much more time to do anything else if the editor wants to see all the shots to choose one or two and then compose the article round them.
I'm not in journalism so may be wrong so if anyone knows better, say so.