Sir, Your fascinating report "Flying car trailblazers try blue sky thinking" (April 28) paints an optimistic view of the future, but doesn't go into details on the regulatory problems that will need to be overcome. Among these will be how the authorities prevent such vehicles being used by burglars; will we have to have a real police "flying squad"?
The dangers of flying vehicles becoming available to terrorists are even more worrying. At the moment, concrete barriers can be used to protect sensitive buildings from attacks by vehicles loaded with explosives. Short of a "force bubble" surrounding each building (an idea common in science fiction but apparently even further away from development than flying cars), how will aerial attacks be prevented?
By comparison with these issues, the problems of day-to-day traffic control and collision prevention for "flying cars" look almost trivial.
David Linnell
Loughton, Essex, UK
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Source: Flying squad in pursuit of the flying getaway car
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