Dr. Martin Lewison, dubbed "professor roller coaster," joined Michael Calhoun with a look at why the Eureka location of Six Flags, along with 6 other parks are being sold to E.P.R. Properties. Lewison calls the Eureka location and the other parks in the deal, 'relative under performers,' for company. He expects some investment in the parks as they become Enchanted Parks later this year. (Photo by Rich Fury/Getty Images)