I don't like where this is going - Alston not serving Kerry while there is a picture of him with Kerry.
I also don't like looking for irregularities in this picture, its too hard to prove.
Having said that, look at the shadow on Kerry's right arm from the wrinkle in his shirt, then look at the shadow on the left shoulder on the guy on the far left from his chin. Something doesn't look right.
I think the sun is almost overhead, slightly to Kerry's left. The far-left guy---blonde---can't his shadow be explained by his head being tilted more than the others? I think perhaps it can.