MP4 April 4, 2017 11:10 am A Surfer's Quest to Understand Tides A surfer’s quest to understand tides and the lesson in climate change that resulted. We’re joined by Jonathan White, author of “Tides: the Science and Spirit of the Ocean.” US & World Videos 2:39 American man awaits sentencing in Turks and Caicos ammo case 2:05 MIT monitors pair of opposing protests on campus 3:41 Cool air to linger over Boston into the weekend 2:28 Karen Read trial continues, jurors visit crime scene 2:44 Karen Read trial Day 4: Jurors to visit crime scene