Delta Variant, Cuba Protests, Branson's Launch

CNBC's Meg Tirrell discusses the spread of the highly contagious delta variant and the new FDA warning about the Johnson & Johnson vaccine's link to a rare but serious autoimmune disorder. NBC's Ed Augustin is live in Havana to deliver the latest updates on the protests in Cuba. CNBC's Kristina Partsinevelos breaks down why some Reddit members who are calling themselves "silverbacks" are stacking up on silver. Plus, retired NASA astronaut Nicole Stott discusses the impact of Sir Richard Branson's sub-orbital flight on the commercial space race.