A clinic at Boston's Children Hospital provides hormone therapy to halt pubescent development among transgender youth, and they are among the first clinics the country to perform this treatment.   Dr. Norman Spack is an endocrinologist and founder of the Gender Management Service Program at the Boston Children's Hospital, and Francie Mandel is Director of Mental Health Services. They are not just working to help transgender youth make this transition, but are also fighting the stereotypes that persist in society around transgender. Our Washington correspondent, Todd Zwillich, is filling in as host all this week. Follow Todd on Twitter for the latest from Capitol Hill. Follow Todd for the latest from Washington //