He recalled the intel about the chemicals for Moreno’s IED—the nitromethane, the diesel fuel, the fertilizer—that were going to reduce the oil company’s headquarters in Miami to a smoking crater. The intel about Moreno’s vicious attacks on America, calling for violent assaults on citizens. The intel about the activist’s reconnaissance of the embassies in Mexico and Costa Rica, planning to blow them to kingdom come too.

They’d been so sure…

And they’d been so wrong.

Wrong about avoiding collateral damage too. De la Rua and the guard.

The primary point of the Long-Range Rifle program at NIOS was to minimize, ideally eliminate, collateral, which was impossible to do when you fired missiles.

And the first time it had been tried in an actual mission, what had happened?

Innocents dead.

Shales had hovered the UAV craft perfectly over the waters of Clifton Bay in the Bahamas, sighted through the leaves of a tree outside with a clear infrared and radar vision of Moreno, double-confirmed it was he, compensated for wind and elevation and fired shots only when the task was standing alone in front of the window.

Shales knew in his heart that only Moreno would die.

But there was that one little matter that had never occurred to him, to anyone: the window.

Who could have thought that the glass would be so lethal?

Wasn’t his fault…But if he believed that, if he believed he was innocent of any wrongdoing, then why had he been in the john last night puking?

Just a bit of the flu, honey…No, no, I’m okay.

And why was he having more and more trouble sleeping?

Why was he more and more preoccupied, agitated, heartsick?

Curiously, while drone operators are perhaps the safest of all combat troops physically, they have among the highest rates of depression and post-traumatic stress in the military and national security services. Sitting at a video console in Colorado or New York City, killing someone six thousand miles away and then collecting the kids at gymnastics or football practice, having dinner and sitting down to watch Dancing with the Stars in your suburban den was disorienting beyond belief.

Especially when your fellow soldiers were hunkered down in the desert or getting blown to pieces by IEDs.

All right, Airman, he told himself, as he’d been doing lately, concentrate. You’re on a mission. An STO mission.

He scanned the five computer monitors before him. The one in front, black background filled with green lines, boxes and type, was a composite of typical aircraft controls: artificial horizon, airspeed, ground speed, heading, nav-com, GPS, fuel and engine status. Above that was a traditional terrain map, like a Rand McNally. An information monitor—weather, messages and other communications reports—was to the upper left.