Tom peered through the scope on his rifle. Small figures moved in the inky darkness near the edge of the ocean. He took a deep breath, stuck his pinky and index finger in his mouth, and whistled a long high note. Short whistles responded. He tested the wind then looked through the scope again. He spotted the target, a group of Alphas on the sand bar. He took a deep breath and pulled the trigger on the exhale. Six more shots rang out around him. Four Alphas fell with shots directly to ...