The founders of Sandy Hook Promise say thousands of schools are committing to training and activities next month in their Start with Hello program.  Nicole Hockley, whose son Dylan was killed on 12/14, says the goal is to reverse the trends of social isolation that many young people are feeling.  The organization's new digital Start with Hello program, underwritten by Disney, will teach empathy and compassion to elementary school students nationwide through a virtual storybook, videos, games and other initiatives.