Twenty-seven years ago, American educator Ronald Sakolsky came to China as part of a teacher exchange program. During his time here, he not only helped support China's reforestation efforts, but also planted a seed of friendship that would take root across generations and borders. When he returned to China after nearly three decades, he found a forest where there had once been a desert. His former students had grown into adults, and old friends had memories of him that had never faded. What can one person leave behind, decades after saying goodbye? Watch "The Seeds We Sow" for a story of teaching, friendship and the enduring connections between people.