“The Star-Spangled Banner” was climbing to its conclusion, and Brittney Griner couldn’t stop the tears. Because her right hand was over her heart and she held a Paris Olympicsposter in a cardboard box in her left, Griner had no way to wipe her reddened, wet eyes. She swallowed hard, as if to calm and reset herself. And try as she might, blinking them away didn’t work, either.