This op-ed originally appeared in The Cipher Brief . Over the last eight years, President Barack Obama’s counterterrorism policy has in large part been defined by drone strikes against a number of terrorist targets around the world. Indeed, the U.S. drone program is a global enterprise, with bases in at least 10 countries, lethal operations in at least seven countries, and coordination of drone operations with numerous partners and allies. But even as the U.S. drone program has become a cornerstone of counterterrorism policy, its implementation has raised a number of questions, particularly...