Reasonable Disagreements: An Appointment With Controversy

The 9/11 attacks on the US were 25 years ago this week and, while there hasn’t been a second such shock, questions remain as to the Free World’s preparedness, whether a divided America can rediscover unity, and the strength of international alliances. Phillip Zelikow, the Hoover Institution’s Botha-Chan senior fellow and executive director of the 9/11 Commission, discusses lessons learned from the attack.

The Panama Canal—the transoceanic waterway through which five percent of global commerce flows—is critical for U.S. national security.

The proliferation of land-based missiles, cheap drones, and integrated anti-access/area-denial networks has overturned centuries of assumptions about naval dominance, allowing regional powers—and their proxies—to hold critical maritime trade at risk. Traditional sea powers must adapt on two fronts: preventing chokepoint closures through deterrence by denial and mitigating them through resilience by design.