Founded in 2003, and headed by the admired - and controversial - Elon Musk, in 2020 Tesla had become the automaker with the highest market capitalization, and the global leader of the electric car market. Was this valuation justified?

Icelandair's 80-plus-year history and hybrid business model -- straddling a full-service carrier and a low-cost carrier (LCC) model -- examined in five crucial moments.