On topics from Guantánamo to drone strikes, I couldn’t let the president act as if he were some helpless official at the mercy of Congress.

Until the president defines what “associated forces” are, the current formulation leaves open the possibility of unlimited, unending use of military force anywhere in the world.

The historic genocide trial of Efraín Ríos Montt was a huge step. But his conviction has been overturned—and many others have blood on their hands, including current president Otto Pérez Molina.

Destroying the planet—with malice aforethought, with only the most immediate profits on the brain, with only your own comfort and wellbeing in mind—is the world's largest criminal enterprise.

As fashion's first couple, the Obamas can take a leading role in making sure US companies comply with global standards.

The Constitutional Court may have vacated Efraín Ríos Montt’s conviction, but the struggle for justice will continue. And nothing can annul the survivors’ testimony and courage.

It’s a starting point: not the tinder or the blaze but a match, a belief in possibility.

The newly unveiled May 4 Visitors Center attempts to reconcile the search for truth with the need for reconciliation and healing.

America's foreign bases are more staggering than ever—and, with your tax dollars, an empire of private contractors is holding them down.

We ignore the ever-growing global arsenal of nuclear weapons at our peril.