Al Roker reflects on future for his granddaughter in TED Talk on climate change: 'What world are we leaving them?' ...

Simon Sinek’s speech—“How great leaders inspire action”—is widely regarded as one of the greatest TED Talks of all time.

MONTEREY, Calif.--It began with a parade by a marching band and ended with a health professor swallowing a Swedish bayonet sword. It's not a circus. It was just the opening two-hour session of TED, ...

Al Roker had another first in his storied career: He gave a TED Talk that focused on climate change, and he used his new granddaughter Sky as inspiration for the speech.