Watch LookMovie. Rubio. Vance. Wiles. Gabbard. Hegseth. Miller. These are some of the key players behind President Donald Trump's expansive use of the U.S. military. FRONTLINE examines the inner circle of advisors and officials trying to project U.S. power, from clashes with allies, to taking out foreign leaders, to waging war in the Middle East. • "The War Cabinet"