This photo by photojournalist Evan Vucci is already an iconic image of our times. The amazing Imitative Photography YouTube channel has a great video showing how that photograph was made - a rare example of how great photography is done.
And yet, some still miss the point. “Right aperture / exposure / iso”, “there’s nothing special about being on this spot, they literally were right there” are some of the comments. Go figure.
Now, I have no idea what the exact settings were. Evan had much more important things to focus on, so it is likely that they were already dialed in for the conditions, or that he was shooting in some semi-automatic mode. In any case, he could've missed on some of those settings and the image would've still been as iconic as it finally turned out to be.
Indeed, the image is iconic not because it's perfectly exposed, it has no noise, or because the color balance is accurate. No, it's all about the story it tells. And making it might look easy, but it was anything but that.
What those commenters are missing is that the image was made because of Evan’s vision, who was able to anticipate what was going to happen next by moving to the right spots; the big balls it takes to point a camera at a presidential candidate when armed forces are looking for a shooter (who you don’t even know if is still active!); the experience it takes to frame your subject perfectly in a chaotic environment without thinking much about it; and the practice it requires to know how to use your camera as fast as Evan did, literally an extension of his body.
When something looks easy but yet only a few manage to do it, you know they are some of the best at what they do. Of course, there’s nothing especial to that shot, provided you are at the right spot, at the right time, ready and with the skills and experience required to make it happen. Other than that, nothing to see here.