Today marks the five-year anniversary of Twitter. Despite all the skeptics who said the concept was just a fad, it looks like Tweeting is here to stay. Here are some of our favorite videos highlighting how communication through 140 characters or less has changed our world.
The Twitter revolution – Twitter's impact as a tool for political and social change was profound during the uprising in Egypt. And the United States was paying close attention. CNN's Jill Dougherty looks at the impact of social media on U.S. foreign policy and how the White House is trying to fight what it calls "internet repression."[cnn-video url="http://www.cnn.com/video/#/video/world/2011/02/15/tsr.dougherty.digital.activism.cnn"%5D
'Tiger blood' and Twitter – Whether you like it or not, celebrities are also harnessing the power of Twitter and if anyone knows the power of Twitter, it's Charlie Sheen. He set the Guinness World Record for gaining the most Twitter followers in a single day. A million followers? That's so early March. He's now surpassed 3 million.[cnn-video url="http://www.cnn.com/video/#/video/bestoftv/2011/03/03/exp.nr.sheen.million.twitter.cnn"%5D
Tweeting for charity – While celebrities are pumping up their fame with the social media tool, many other outlets are using it for charitable reasons. Our Fredricka Whitfield reports on a grassroots organization called Beremedy that is using Twitter as a tool to help those in need. The concept is simple. They Tweet a need. If you can help, you Tweet back.[cnn-video url="http://cnn.com/video/?/video/us/2011/03/19/whitfield.tweet.a.need.cnn"%5D
You can read more on the five-year anniversary of Twitter here.