Warning: This story and post discuss suicide. On the last day of Rezwan Kohistani’s life, he ate lunch alone. Three other boys shared his table in the high school cafeteria, two of their trays touching Rezwan’s, surveillance video shows. They laughed among themselves, seemingly oblivious to their classmate, even after one of the boys reached to grab something from a friend and accidentally knocked over Rezwan’s milk carton. Rezwan, a freshman, was an Afghan refugee who had arrived at the school four months earlier. He sat at the table for a few more minutes, at one point covering his face in apparent distress. Then he got up and made his way through the halls, past a bulletin board announcing, “You belong.” He pushed open the school door, walked out into the rain and sent his mother a text in his native language, Dari, saying “goodbye.” Hours later, just over four months after Rezwan’s family had fled the Taliban and was resettled in a small Missouri town, the 14-year-old was fou...