Bill and Melinda Gates are "impatient optimists". In a speech given October 27, 2009, at Sidney Harman Hall in Washington, D.C., they narrated an evening of global health success stories. As witnesses of remarkable successes due to global health funding, Bill and Melinda Gates have committeed to telling U.S. investors that their funding is working and health around the world is improving. To watch the speech and learn more why you should be an impatient optimist please visit the Bill & Melinda Gates Foundation's Living Proof website.