 This is KNPR News. I'm Dave Becker. Demolition company hired to plan the implosion of the Tropicana filed for a 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.