Despite coming under fire from the air, sea and land, they held out against a force of more than 3, 000 Germans for seven days.

BBC: Poland remembers World War start

Though a program displays panels showing all the critical processes of a real rig (fire and gas detectors, valve status, oil flow from the sea bed and so on), and then responds to the actions of the trainee by altering these displays appropriately, a human operator can intervene at any time if things seem to be going too smoothly.

ECONOMIST: Virtual reality