CNN Student News is celebrating its 20th anniversary today. The last segment in today’s episode takes a look back at some of the top stories of the last twenty years. For all of today’s high school students some of these stories are older than they are. The montage of news clips could be a great way to introduce a study US and world news at the end of 20th century and the beginning of the 21st century. The video is embedded below. Make sure you also check out the photo gallery that accompanies the video montage of news stories from the last twenty years.