Hard disk drives containing data which might reveal the locations of US nuclear weapons and weapons-grade fissile material, along with intelligence data on Russian nuclear technology, have gone walkies from a vault at the Los Alamos National Laboratory.The drives, which contain data used by the Nuclear Emergency Search Team, which responds to nuclear accidents and nuclear-related threats from terrorists, were lost between one and two months ago. They?d been stored in locked containers in a vault in the laboratory’s X Division, where nuclear weapons are designed. The containers were in the vault, but found to be empty, officials noted, raising the vague hope that the drives could be in use somewhere in the Lab for a legitimate purpose. The data on the drives includes all the information on American nuclear weapons needed to render them safe in emergencies, officials said. The drives also contained intelligence information on Russian nuclear weapons programmes. ?At this point there is no evidence that suggests espionage is involved in this incident,? Department of Energy (DoE) office of counter-intelligence Director Edward Curran said earlier this week. But then, there’s no evidence that it isn’t, either. In fact, no-one can remember where they left the evidence…