Everything you ever wanted to know about the Palm Springs or any other windmills, but were afraid to ask. KESQ-TV's Gil Diaz goes behind the locked gates to reveal the "Secrets of the Windmills".  Video gives specifics of the wind mill, 228 feet tall and blades nearly 100 feet long. There are about 4,800 wind mills, they were first installed in 1981, they installed as an experiment by NASA.  Where they are installed is the second most consistently windy place in the world, the first is in Africa.  The wind turbines generate enough 140,000 to 190,000 homes.  The cost of one wind turbine is about $1.5 million. People who live near-by do not like them, but comment that they are a benefit.  Somewhat poor quality of video but information is good.  Good for middle elementary grade students. Run time 03:29.