 This is KNPR News. I'm Dave Becker. Demolition company hired to plan the implosion of the Tropicana filed for permit Thursday. KLAS television reports that the company, Controlled Demolition, is asking to proceed with the implosion of the 22-story concrete Tropicana Club and 22-story steel Paradise Tower in what it says will be a single explosive event. Demolition companies are planning to set up no earlier than September 30th, with the demolition to be finished by October 8th.