Body Scan Machines to Search London Tube Passengers
Tube passengers are to have their bodies scanned by machines that see through clothing to carry out random checks as people enter stations after services resume today. Police and transport officials are also considering installing the equipment permanently at stations across the network. The system works by measuring the solar radiation reflected by people�s bodies and measuring anything which interferes with the reflection.
Body scan machines to be used on Tube passengers, Times, July 8, 2005.