Top Secret Drone, Roosevelt's War Club & Clara Barton Letter

In this episode, Elyse Luray investigates a propeller that may be from a WWII-era drone aircraft. Then, an inscribed, wooden club appears to be a gift to Teddy Roosevelt. Tukufu Zuberi find out who gave him this club, and why? And Eduardo Pagan follows the trail of a letter and learns about Clara Barton's humanitarian work during the Civil War.