No one is likely to mourn al-Awlaki himself -- which is what made his assassination so safe in the first place -- but we sure ought be mourning the fact that it happened, and that it's likely to happen routinely from now on. The Obama administration has demonstrated once again, as it did in Libya and as it's done in a variety of surveillance cases, that its view of executive power in the arena of national security is hardly any less expansive than Dick Cheney's was. The fact that this was predictable makes it no less alarming. Regardless of how any of us feels about warmaking in general, there are very good reasons that national governments are more constrained in their ability to kill their own citizens than in their ability to kill foreigners, constraints enshrined in both the explicit rules and longstanding traditions of due process. That bright line has grown a lot dimmer today.