Sandy Hook Promise has launched a 90-second PSA showing some warning signs and signals that someone might hurt themselves or someone else.  The goal is to stop tomorrow's shooting by recognizing the signs today.  Sandy Hook Promise has trained 2-and-a-half million students and adults in a no-cost "Know the Signs" programs, which the organization says has been credited with helping to avert a couple of school shootings. 

Sandy Hook Promise released a PSA last year, which has been viewed more than 150-million times.