The Air Force's vast fields of underground nuclear missile silos are rarely disturbed by more than the occasional wandering cow or floating spy balloon. But the service is now asking Congress to help with another unexpected danger: towering wind turbines, which are growing in number and size and are edging closer to the sites each year.
The silos share space on vast private farmlands with the turbines. Whereas the nuclear launch sites are almost undetectable — just small, rectanglular plots of land marked only by antennae, a chain-link fence and a flat 110,000-ton (100,000-metric tonne) concrete silo blast door — the turbines are hundreds of feet high, with long, sweeping blades that have parts so large and long they dwarf the 18-wheeler flatbed trucks that transport them to new sites.
