How to Respond to another person's Tweet on Twitter

In this clip, you'll learn how to post a reply link to another Tweet on Twitter. What do President Obama, the Dalai Lama and Justin Bieber have in common? Why, they're all on Twitter, of course. Join the party. Whether you're new to Twitter's popular microblogging application or just missed a few of the essentials along the way, you're sure to benefit from this free video tutorial.