“Callan sucked in a breath. As a sniper, he’d been trained by the Marines to know and recognize moments. 

Moments when all the training—his focused mind, muscle memory, weapon knowledge . . . 

When all the preparation—target reconnaissance, angle of attack, position scouting . . . 

When all the setup—hidden amid the terrain, barrel aimed, trajectory known . . . 

When everything came together in one crucial moment—when the sniper squeezed the trigger and took his shot.”