A Florida-based thrill ride developer wants federal approval, for a 650-foot-tall roller coaster on the Las Vegas Strip.
Company president Michael Kitchen says the ride would be so tall, it needs an OK from federal aviation officials.
He says it would be the tallest roller coaster in the world.
Kitchen tells The Associated Press it's too early to talk publicly about the development plan.
The application shows the tower at the Tropicana Las Vegas hotel-casino on the south end of the Strip.