Crawling robots will survey ageing US nuclear missile silos

Robots are going to be employed to crawl over nuclear missile silos in the US, automating maintenance that has previously been done manually. Some 400 steel and concrete silos housing Minuteman III intercontinental missiles are spread across Wyoming, Montana and North Dakota. Constructed in the early 1960s for an earlier generation of missiles, the silos were designed to withstand megaton-level nuclear strikes. Each is 30 metres deep and 5 metres across, with a missile inside.