In the first few days of the new year, extremists attacked the U.S. Capitol, leading to the deaths of five people. The riot was planned openly online, but were there other warning signs? Last fall, the Department of Homeland Security warned that white supremacists are the most “lethal and persistent threat” within the United States. And the warnings, go back further than that. In 2009, Daryl Johnson, a former analyst with the Department of Homeland Security, wrote an internal report, detailing how far-right extremists planned to recruit and radicalize returning military veterans to exploit their training to carry out violence. But he says that warning was written off. He tells Soledad O’Brien politics disabled any serious public discussion about the threat already emerging on our homeland.