Terrorism is all too real a threat, and mass attacks cause a special kind of fear. Terrorist movements like ISIS kill innocents for the worst of causes and the worst of reasons. They seek to use fear to separate the West from the Muslim world, and to divide the Muslim world...

Yemen—perhaps the most impenetrable state of the Arab world—has never managed to develop that most important of state institutions, a cohesive and effective national army.

On July 1, 2016, the White House issued a factsheet summarizing its new report on civilian casualties from drones or unmanned aerial combat vehicles (UACVs). Evidently, this is a summary taken from a much longer report that has not been publically released. The release of...