While the Alvin sank into the depths, the Atlantis moved in a slow circle above the dive area and the support crew gathered with the chief scientist in the top lab, between the bridge and the chart room, where the dive is monitored.

The top labs - Los Alamos, Livermore and Sandia - have recently sought new challenges to work on the design of warheads, most especially ones robust enough to penetrate solid rock and hardened concrete to demolish enemy bunkers buried deep underground.

CSI Oxford: behind the scenes at Britain's top forensic lab 2.

Even your top labs would have a tough time fining this down.