The resemblance to an actual dog is loose but the quadrupedal robot dogs known as “Spot” from Boston Dynamics do have four legs. They're often used to do reconnaissance in hazardous environments. And four of them are working security at the World Cup games in Dallas and New York. Marketplace’s Meghan McCarty Carino spoke with Merry Frayne, at Boston Dynamics about Spot’s capabilities and why they wanted to deploy them at live sporting events.