Muhammad al-Tuhayf was relaxing at his house late in the afternoon on Dec. 12, 2013, when his iPhone rang. A boxy, tired-looking Yemeni shaykh with large hands and a slow voice, Tuhayf heard the news: A few miles from where he was sitting, along a rutted-out dirt track that snaked through the mountains and wadis of central Yemen, U.S. drones had fired four missiles at a convoy of vehicles. Drone strikes were nothing new in Yemen — there had been one four days earlier, another one a couple weeks before that, and a burst of eight strikes in 12 days in late July and August that had set the country on edge. But this one was different: This time the Americans had hit a wedding party. And now the government needed Tuhayf's help.

The corpses had already started to arrive in the provincial capital of Radaa, and by the next morning angry tribesmen were lining the dead up in the street. Laid out side by side on bright blue tarps and wrapped in cheap blankets, what was left of the men looked distorted by death. Heads were thrown back at awkward angles, splattered with blood that had caked and dried in the hours since the strike. Faces that had been whole were now in pieces, missing chunks of skin and bone, and off to one side, as if he didn’t quite belong, lay a bearded man with no visible wounds.

Clustered around them in a sweaty, jostling circle, dozens of men bumped up against one another as they struggled for position and a peek at the remains. Above the crowd, swaying out over the row of bodies as he hung onto what appeared to be the back of a truck with one hand, a leathery old Yemeni screamed into the crowd. “This is a massacre,” he shouted, his arm slicing through the air. “They were a wedding party.” Dressed in a gray jacket and a dusty beige robe with prayer beads draped over his dagger, the man was shaking with fury as his voice faltered under the strain. “An American drone killed them,” he croaked with another wild gesture from his one free hand. “Look at them.”

A few miles outside of town, Tuhayf already knew what he had to do. This had happened in his backyard; he was one of the shaykhs on the ground. Only three hours south of the capital, the central government held little sway in Radaa. Like a rural sheriff in a disaster zone, he was a local authority, someone who was known and respected. And on Dec. 12, that meant acting as a first responder. Tuhayf needed to assess the situation and deal with the fallout. Every few minutes his phone went off again, the marimba ringtone sounding with yet another update. Already he was hearing reports that angry tribesmen had cut the road north. Frightened municipal employees, worried that they might be targeted, kept calling, begging for his help. So did the governor, who was three hours away at his compound in Sanaa.

It didn’t take Tuhayf long to reach a conclusion. The Americans had made a mess, and to clean it up he was going to need money and guns.

This is the other side of America’s drone program: the part that comes after the missiles fly and the cars explode, when the smoke clears and the bodies are sorted. Because it is here, at desert strike sites across the Middle East, where unsettling questions emerge about culpability and responsibility — about the value of a human life and assessing the true costs of a surgical war.

For much of the past century, the United States has gone to war with lawyers, men and women who follow the fighting, adjudicating claims of civilian casualties and dispensing cash for errors. They write reports and interview survivors. But what happens when there are no boots on the ground? When the lawyers are thousands of miles away and dependent on aerial footage that is as ambiguous as it is inconclusive? How do you determine innocence or guilt from a pre-strike video? When everyone has beards and guns, like they do in rural Yemen, can you tell the good guys from the bad? Is it even possible? And when the U.S. gets it wrong, when it kills the wrong man: What happens then? Who is accountable when a drone does the killing?

On Dec. 12, 2013, a U.S. drone carried out a strike in Yemen. Little of what happened that day is known with any degree of certainty. Most of the facts are adrift somewhere in the shadowy sea of a classified world. Identities shift and change depending on the vantage point, and what appears true thousands of feet up in the air often looks different on the ground. Following two reviews, the U.S. claims it was a clean strike and that all the dead were militants. Yemen disagrees, calling the attack a tragic mistake that killed civilians. Two countries, two conclusions. But one of them paid the families of the dead men a lot of money.

Yemen is a U.S. ally that says it approves every drone strike, but it is also so strapped for cash that the government has implemented numerous austerity measures. Either it handed out the money and guns to cover for its partner, or the U.S. privately paid money to the families of men it publicly describes as al-Qaeda while simultaneously promoting the man responsible for the strike. In truth, only three things are known for certain: Twelve men are dead, $800,000 in cash was delivered, and the dead can’t be both guilty and innocent.