On Thanksgiving, it’s worth celebrating a breakthrough moment. When wins and podiums become quotidian, perhaps the luster wears over time. Sports fans love the breakthrough — the moment it first comes together for an athlete. In biathlon, the moving parts are many. The fitness, the pacing, the skis, the steady mental state on the range, the breathing, the shooting, the wind flags, and the targets falling — they all must align. Kelsey Dickinson, 26, of...