Gary Busey, Tommy Davidson, Cheryl Tiegs sign on for 'Sharknado 4'

CLEVELAND, Ohio --The 'Sharknado' franchise is reaching new levels of cheesiness. The Syfy network has announced principal casting for the fourth installment of the "Sharknado" franchise, which will star Gary Busey, comedian Tommy Davidson and former model Cheryl Tiegs, among others....