Copyright law doesn't care about whether it's commercial or not.
Damages awarded in case it goes to trial does to some extent, though the recording industry has come a long way towards establishing precedence for punitive damages even for non-commercial infringements.

If you put a note next to the image that it's copyright Reuters and you believe it's used in accordance to fair use, you've come a long way towards establishing good faith use, especially if the note includes a link to the hosting site.

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‘To those who regard “crime fiction” as some sacred icon which must follow a rigid formula, I will always be the man who writes 18-syllable haiku.’Trying to make sense of computers, The Error Log.