11K views · 178 reactions | In 2000, after a legal battle over the results, Al Gore conceded to George W. Bush. In 2008, John McCain highlighted the significance of Barack Obama's win. Here’s a look back at some historic presidential concession speeches. | Reuters | Facebook

140K views · 156 reactions | Former Vice President Al Gore sounded the alarm about the climate crisis in the 2006 Oscar-winning film “An Inconvenient Truth.” 15 years after its release, Gore tells Lester Holt that the “crisis is getting worse, much faster than we are yet mobilizing solutions for it.” | NBC Nightly News with Tom Llamas | Facebook