Alicia Menendez is joined by NBC News’ Ken Dilanian, Liz McLaughlin, Erin McLaughlin, Deon Hampton, Sam Brock, Shaquille Brewster, NBC News/MSNBC Terrorism Analyst and Ret. ATF Special Agent in Charge Jim Cavanaugh, MSNBC Political Analyst and Fmr. United States Secretary of Housing & Urban Development Julian Castro, Brennan Center Fellow Eric Ruben, TX State Sen. Roland Gutierrez, Co-Founder & CEO of Sandy Hook Promise Nicole Hockley, Former Acting Assistant Attorney General for National Security at the U.S. Department of Justice and MSNBC Political Analyst Mary McCord, Co-Founder & Executive Director of Guns Down America Igor Volsky, and Co-Founder of Orange Ribbons for Jaime Fred Guttenberg.