The passing of Rush Limbaugh leaves an enormous hole in the radio industry. An icon in the radio world, Limbaugh's contribution to broadcasting is impossible to calculate, and his impact on talk radio in particular brought us all a new format and new life to the AM Radio stations in the country. Dave Zanotti and Mike look back on Rush's legacy. Also, Mike talks with Todd Nettleton, host of the nationally syndicated "Voice of the Martyrs" radio show. Todd has his first book coming out on March 2.