The shadow war

The strike, though, was not the work of Mr. Saleh’s decrepit Soviet-era air force. It was a secret mission by the United States military, according to American officials, at least the fourth such assault on Al Qaeda in the arid mountains and deserts of Yemen since December.

The attack offered a glimpse of the Obama administration’s shadow war against Al Qaeda and its allies. In roughly a dozen countries — from the deserts of North Africa, to the mountains of Pakistan, to former Soviet republics crippled by ethnic and religious strife — the United States has significantly increased military and intelligence operations, pursuing the enemy using robotic drones and commando teams, paying contractors to spy and training local operatives to chase terrorists…

While the stealth war began in the Bush administration, it has expanded under President Obama, who rose to prominence in part for his early opposition to the invasion of Iraq. Virtually none of the newly aggressive steps undertaken by the United States government have been publicly acknowledged. In contrast with the troop buildup in Afghanistan, which came after months of robust debate, for example, the American military campaign in Yemen began without notice in December and has never been officially confirmed…

Yet such wars come with many risks: the potential for botched operations that fuel anti-American rage; a blurring of the lines between soldiers and spies that could put troops at risk of being denied Geneva Convention protections; a weakening of the Congressional oversight system put in place to prevent abuses by America’s secret operatives; and a reliance on authoritarian foreign leaders and surrogates with sometimes murky loyalties.