“I’M HERE TO HELP” — ON A BOSTON TO ZURICH FLIGHT, A BILLIONAIRE’S DAUGHTER BREAKS DOWN IN TEARS, UNTIL A TEENAGER REACHES OUT AND CHANGES EVERYTHING. The cries cut through the air like shards of glass. Little Nora, barely a year old, sobbed in her father's trembling arms as the plane from Boston to Zurich cruised through the clouds. First class — a sanctuary of silence and comfort — had turned into an echo chamber of restless sighs and judging glances. Passengers shifted in their leather seats,