The United States holds enormous power and responsibility in the world. With the US presidential transition underway, ISW President Kim Kagan sat down with Lt. Gen. H.R. McMaster (US Army, ret.) to discuss the many challenges facing the United States, including the pernicious effect of Chinese military diplomacy and the threat from Iran. McMaster argues that US troop deployments, and other forms of engagement abroad, "are immensely important to sustaining our security and prosperity" and that the US must savvily modernize its armed forces. McMaster outlines his view of the strategic successes and failures of the Obama and Trump administrations and his recommendations for President-elect Biden and his team. H.R. McMaster served as national security advisor from 2017 to 2018 and is the author of the recently published book Battlegrounds: The Fight to Defend the Free World.