Fred Guttenberg, activist against gun violence and father Stoneman Douglas High School shooting victim Jaime, speaks during a press conference calling for gun violence prevention priorities in Congress Thursday in Coral Springs. Fred Guttenberg, whose daughter Jaime was one of the 17 people killed in the Marjory Stoneman Douglas High School massacre, supports a proposed Florida law that would require people to go through background checks before being allowed to buy ammunition in the state. (Taimy Alvarez / South Florida Sun Sentinel)