Sandy Hook Promise is a national nonprofit organization founded and led by several family members whose loved ones were killed at Sandy Hook Elementary School on December 14, 2012. Their mission is to end school shootings and create a culture change that prevents violence and other harmful acts that hurt children. Through their proven, evidence-informed Know the Signs programs and sensible, bipartisan school and gun safety legislation, they teach young people and adults to recognize, intervene, and get help for individuals who may be socially isolated and/or at risk of hurting themselves or others.