Schools of chinook salmon once swam up Klamath River in California every fall. These fish were returning to the streams where they were born to spawn, or lay eggs. But over the past 100 years, dams were built along the river, preventing salmon from making the journey. For decades, conservation groups and local Indigenous tribes, like the Yurok, have fought for the removal of the dams. Last August, they finally succeeded. Four dams were fully deconstructed in the largest dam removal project in United States history.