"My little sister was sitting alone in the cafeteria, staring at her shoes, while the school’s “golden boy” poured a carton of chocolate milk over her head. The entire room erupted in laughter. They were recording it for TikTok. They thought she was just the weird, quiet girl with no friends. They didn’t know her big brother had just landed from an 18-month deployment. And they definitely didn’t know I wasn’t alone. I brought my whole unit with me to surprise her for lunch. When those double doo