Mitt Romney's impressive victory Tuesday makes it very likely that we will look back on the Florida primary as the contest that determined the 2012 Republican nomination. To be sure, the campaign fight will go on, and Romney is by no means assured of a sweep of the relatively few February contests.

Despite our well-deserved jubilation when another terrorist rightfully meets his maker, the global war against Awlaki's ilk is far from over. Understanding what his death does and doesn't mean has consequences extending far beyond one enemy combatant's demise.

On Dec. 14, 2011, President Obama proudly proclaimed the “end” to the Iraq war, announcing that “there is something profound about the end of a war that has lasted so long." For nearly a decade, AEI scholars have written on the conduct of the Iraq war, the foundations of the invasion and the prospects for a postwar Iraq.

As the guarantor of international security, the United States must commit to a long-term military presence in Iraq and Afghanistan. But what are the tools necessary to succeed on the new battlefields of the Long War?

In this series of incisive essays, AEI's renowned defense scholars Thomas Donnelly and Frederick W. Kagan, together with a group of leading U.S. military officials and national security experts, identify the tools necessary to succeed on the uncharted battlefields of the Long War.

In their series of incisive essays, renowned defense scholars Thomas Donnelly and Frederick W. Kagan, together with a group of leading U.S. military officials and national security experts, identify the tools necessary to succeed on the uncharted battlefields of the Long War.

The United States must have a sustained military presence in Afghanistan in order to defeat Taliban and al Qaeda efforts to make Afghanistan a base for international terrorism, and to prevent nuclear weapons from falling into the hands of radical Islamists.

The Cold War is an increasingly distant memory in American military minds, except in the minds of the arms control community, and in particular those who seek the elimination of nuclear weapons. Alas, our president is a member in good standing of this community—indeed, an organizer.So, too, it...