By JP Phillips, Correspondent, The Times The Johnson Family some years ago. Image courtesy Unionville-Chadds Ford School District. Joanna Johnson is a Spanish teacher at Unionville High School.  11 years ago, she and her husband Paul, received a devastating news about their two very-young sons.  Elliott (now 14), and Henry (now 12) were both diagnosed with Duchenne Muscular Dystrophy. According...