Watching the World change: The Stories Behind the Images of 9/11 by David Friend, is not just telling the stories about the 9/11 event, but explores the process of news gathering and reporting. The September 11 attacks represent one of the most serious terrorist activities in world history, resulting in the deaths of 2,996 people and incalculable financial losses. It is also one of the most researched and universally followed news events in human history. The author uses hundreds of relevant stories that tell us what happened behind these news images, where these photographers were, how they took those photos. By viewing these images, Friend takes us to experience the activities of the photographer, rescuers, victims and survivors. It can easily be seen that citizens play an active role in news reporting, particularly in the collection process. It also shows and partly comments on how media, especially digital technologies, transmit information immediately and produce such an unbridled effect throughout the world. There are more than two billion people who see the horrific terrorist activities as they happened. Excluding the introductory chapter, this book is conveniently made up of seven chapters, or the seven days after 9/11. A friend uses the photos to tell many stories that happened after the September 9 attack and attempts to trace the role of these photos over the seven-day period. Based on the event that happened, the time and date of publication of these images, the author has separated these stories into seven chapters. After an overview and basic introduction of the book, the first chapter (Tuesday, September 11) is a special chapter in this book. As the coverage of the day of the September 11 attack, this chapter is full of the feeling of the scene. From the detailed description, the reader can understand... halfway through the paper... the opinion is fully manifested in this book. The author uses the most original and meticulous words to record the significant story. It also tells us how these historical moments were recorded, how they were projected onto the world by digital media, how people react to these images. In the era when digital cameras and cell phones were not ubiquitous but were starting to become popular. The story was recorded in a truly different medium. Nowadays, social networks have made news turn faster, citizens participate more actively in news. The phenomena discussed in this book have reached profound development, the digital age is coming. Overall, Watching the World change: The Stories Behind the Images of 9/11 is a great document for looking at the 9/11 event and media. It is also a memorial to help us remember those victims, those stories and those heroes of times gone by.