Italy searches for survivors after a devastating earthquake. Turkey escalates its role in the fight against ISIS. And Colombia and the FARC rebels sign a peace treaty ending a half-century-long guerrilla war. A panel of journalists joins guest host Derek McGinty for analysis of the week's top international news stories.
Deep in the heart of an uncharted rainforest in Northern California lives the tallest tree on the planet. Author Richard Preston tells the story of the majestic Sequoia sempervirens and the daring group of botanists and amateur naturalist who scaled the tallest trees and discovered a new ecosystem.
- Richard Preston a writer for "The New Yorker," and author of "The Hot Zone," "The Demon in the Freezer," and the novel "The Cobra Event."
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