July 17, 2019: 2020 Candidate Sen. Cory Booker; New Research Into Origins Of HIV

New Jersey Sen. Cory Booker talks with Here & Now's Jeremy Hobson about his campaign to be the Democratic presidential candidate. Also, scientists at the University of Arizona say they've discovered the oldest instance so far of the genetic code for HIV. That and more, in hour one of Here & Now's July 17, 2019 full broadcast. You can read and hear more at hereandnow.org, follow us on Twitter and join the conversation on Facebook.