“You here to carry the gear, sweetheart?” the staff sergeant called across the range—and when the line chuckled, I kept loading the last magazine and told them, “Step back,” because the scuffed rifle, the calm in my voice, and the single stripe they thought was a joke were the only warning that qualification line was about to get very quiet.

He didn’t believe her. None of them did. Because when Avery Lane looked that Marine dead in the eye and said two words — last chance — they laughed. They…