we caught up with alex whittington. >> we need to let our legislators know that we have the power toact change. >> reporter: this demonstration was made up of more than just students, signs, and speeches. voter registration tables are ott up, encouraging young people to vote. 17-year-old briana farella says she plans to register today. >> it's one of the worst things to do, if you want things to change, is to remain silent. >> reporter: well, only two states have strengthened gun legislation since the parkland school shootings in february. that's florida and vermont. and, jeff, at the federal level, not much has changed. >> glor: jericka duncan, who got to see the protest firsthand today. jericka, thanks. we know more tonight about the ambush murders of two sheriffs deputies in northern florida. deputy taylor lindsey and noel esmirez were gunned down yesterday in a restaurant. what we don't know is why. anna werner is following. >> reporter: investigators initially thought the two officers had been shot by a man standing outside the front window of this chinese restaurant. >> we know