By replaying tweets, you can explore any topic that people have discussed on Twitter. Want to know how the news broke about health care legislation in Congress, what people were saying about Justice Paul Stevens’ retirement or what people were tweeting during your own marathon run ? These are the kinds of things you can explore with the new updates mode.The replay feature is rolling out now and will be available globally in English within the next couple days (if you want to try it now, try out this special link ). For our initial release, you can explore tweets going back to February 11, 2010, and soon you’ll be able to go back as far as the very first tweet on March 21, 2006.All of us are just beginning to understand the many ways real-time information and short-form web content will be useful in the future, and we think being able to make use of historical information is an important part of that. As for me, after some hard work on real-time search, it’s time for a virtual vacation to relive one of my favorite moments of the Winter Games.