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'This is not a school safety issue, this is an American safety issue'
Student activist Matt Post says gun violence has become our reality - but it doesn't have to be. Lucy McBath, mother of Jordan Davis, a victim of gun violence, also joins the conversation with Chris Hayes.
Details of Santa Fe mass gun murder still developing03:07
Students across U.S. walk out of class to advocate for gun reform01:21
Key figure in Russia's NRA outreach ploy added to sanctions list11:20
Gun control activist students call for April 7 town halls01:57
Students press for change on guns ahead of March For Our Lives08:48
DC's Cherry Blossom Festival delayed for anti gun violence March01:22