Bill Gates on How to Fix World's Biggest Problems [LIVE VIDEO]

Bill Gates is taking his message and passion for making the world a better place to students across the country. As we announced last week, he is embarking on a three-day tour of colleges across the nation to discuss how we can get the world's brightest people to focus on its biggest problems.

Today, Bill Gates is making the final presentation on his tour, at Harvard University's Sanders Theatre. We're proud to be live streaming his presentation and his Q&A with Harvard students discussing technology, charity, and how we can change the world.

We've embedded the live stream above (it begins at 3:00 p.m. ET). We encourage you to live comment on Bill's talk in our comments section below!