Expresses the sense of Congress that the United States must address gun violence. Expresses support for the following: reinstating the ban on the sale of assault weapons, ensuring that children can attend school and live free from the threat of violence, ensuring that school districts create learning environments where all students can excel, providing evidence-based school threat assessments, keeping dangerous weapons out of the hands of unauthorized individuals, promoting information sharing to facilitate the early identification of threats, providing evidence-based training to recognize the indicators of violent behavior, and facilitating relevant research to expand access for mental health services.