Host Brian Stelter checks in with Vanity Fair’s Dan Adler, who describes the strange scene at Donald Trump’s hush money trial. Then Stelter speaks with “Columbine” author Dave Cullen about the 25th anniversary of the Colorado school shooting. Cullen discusses what changed, and what didn't, about American culture, police practices and gun laws. He also reflects on his personal connection with the families intricately linked through an unending American tragedy.