>> here with me is matt post, a high school student who spoke yesterday at the march in d.c. tell us, for those who may have missed -- this was incredible. you could feel the energy there. 800,000 plus people just in washington, d.c. alone. what was your message to that assembled crowd and to the world? >> we want change. if this congress isn't willing to pass comprehensive gun control on november 2018, we will elect a new congress to get it done. >> you are a student member of the board of education of the montgomery county schools. we know maryland suffered a school shooting in the interim, in the last 39 days. it hasn't even stopped. what concrete changes do you think would prevent another mass shooting or another shooting in schools or anywhere? because they are happening in theaters, concerts, nightclubs. >> i think something important to acknowledge is that these shootings are not just happening in schools and they're not just