these tower cranes. if a crew that specializes in setting up and lowering these power cranes is available. there is no time to be able to bring down one of these tower cranes. >> so what do they do? just spin around in the wind? >> they spin around and they're basically unpowered. and they go in circles just like a wind bine. but during hurricane wilma and katrina that we had here in south florida, they did very well. there was no power crane that collapsed. but the issue -- we made a statement about these because of the strength of hurricane irma. >> well, maurice pons, thank you very much. the deputy director of the city miami building department. we appreciate your time. good luck to you down there.