What we know about the newly unsealed documents used in search of Trump's Mar-a-Lago home

An affidavit supporting the August search of the former President Trump's Florida estate was made public on Friday. The U.S. Justice Department released a heavily redacted copy of the 32-page document. Among other things, it says 15 boxes of material taken from Mar-a-Lago in a previous search had contained classified material. National security attorney Mark Zaid joins John Yang to discuss.