Parkland shooting victim's parents speak out: "Your kids are still not safe enough"
One year ago today, 14 students and 3 staff members were killed in a mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida. One of those students was Joaquin Oliver. Now his parents are turning this tragedy into activism. Manuel and Patricia Oliver join CBSN to discuss pushing for stricter gun control and improving school safety.