Prof. Yossi Sheffi speaks with David Pogue of CBS Sunday Morning about what’s causing the current supply chain breakdowns. "The underlying cause of all of this is actually a huge increase in demand,” says Sheffi. “People did not spend during the pandemic. And then, all the government help came; trillions of dollars went to households. So, they order stuff. They order more and more stuff. And the whole global markets were not ready for this."