By the end of June, Kajsa Fernstr\xf6m N\xe5tby was homesick. The native Swede had just finished a 5-month internship with her country\u2019s diplomatic office near the UN headquarters in Manhattan, darting between debates on migration and ocean plastic. Now, her parents were pleading for her to hop on an 8-hour flight across the Atlantic and rush home. But Fernstr\xf6m N\xe5tby had a different idea.