reporter: and there at columbine, where 13 died, a tribute to the victims of both tragedies. on the west coast, 17 empty school desks. our kayna whitworth with those feeling heartbreak. something about the empty desk is just sort of really hits home. reporter: students here in parkland making the long walk to a memorial, vowing to never forget those they lost. this is just another step. this is honestly, this is a statement. we demand change. and victor oquendo with us live once again tonight from parkland, florida. and victor, as you know, in washington, they did pass a school violence bill in the house, but tonight, critics say it doesn t actually have any gun control measures? reporter: that s right, david. it s called the stop school violence act, and it does not address gun control at all. what it does is dedicate half a billion dollars towards training law enforcement officers and school officials. it also adds security equipment around schools. it passed by an