I will assume facts not in evidence...that this is your handsome family...

Focus is either there or it is not. All of us realize we are not fortunate enough to take a perfect pic every time. Simple solution...retake the picture and don't worry about it. It's one of the beauties of digital vs film.

Open Finder to locate the PICTURE in the 'missing' folder. Highlight the picture and go to the menu bar. Select the button on the right end (if you hold the cursor over it, it will say ...'Perform tasks with the selected item' ). Open the drop down menu and select GET INFO. A window will open that will show WHERE and you should be able to see where the picture is 'hiding.'

May the health Gods push the right reset button for a long journey not yet complete.

How do pro cameramen covering the sport carry in those 600mm lenses, monopods, etc? Didn't know they made clear plastic bags that big !