Safety professionals are rightly making increasing use of photographs and videos to train and educate the workforce, and to analyze incidents. In particular, security cameras often provide a fine record of an event as it unfolds.
However, it is important to be careful. Not only can images be deliberately changed, but the camera may not record everything of relevance. The following set of pictures was taken by a process safety professional who was visiting the Grand Canyon as a tourist. So, there is no doubt as to their legitimacy.