Photo's can be manipulated in many ways, it can be achieved using many different computer programs. An image hasn't got to be professionally edited in an upmarket software to change the context of an image because it can be done easily just by cropping it and selecting a certain point which could also be viewed as a different meaning.
This has been done for many years in a lot of political photo's to change the meaning of the image and also to be used as a weapon, people can change a photo from the war to change the whole truth and perspective of what is happening like in a photo i have have recently viewed called Vietnam execution which has a man executing another man, which could be viewed as one higher ranked officer shooting a innocent civilian or a criminal shooting someone that has betrayed him, although this picture has not been physically manipulated we can mentally manipulate it.
Juxtaposition is another way of changing the impression of an image because if you put one image next to another it could almost tell a differents story.
