Actually, we'd have to ask the photographer if this picture was flopped. A lot of times, news outlets flip the picture horizonally so that the subject faces the right direction for the page layout. In such a case, the handedness reverses.
Unless BOTH of the people raising their hands raised their left hands, this wasn't reversed.
The handedness of the picture can probably be inferred from the buttons on the women's jackets. Looking at it, I think the picture has not been flipped, but I could be wrong.