Because it allows the private sector to help us win the War on Terror with the coolest toys ever:

It is the size of a cigarette packet and it could provide soldiers of the future with battleground intelligence at the flick of a joy stick.

The PD-100 Black Hornet 'nanocopter' is a long way from the remote control whirlybirds favoured by anorak-wearing model aeroplane enthusiasts.

[...] Weighing in at just 0.5g, the tiny servos mean the PD-100 is even smaller than a toy battery helicopter.

Powered by an electric motor, the microcopter has 4in rotor blades, carries a tiny digital camera and flies at speeds of up to 20mph.

It has been tested successfully inside and outside in very light winds.

'The helicopter can be carried in a pocket and launched within seconds to give immediate situational awareness,' said Petter Muren, boss of manufacturers Prox Dynamics.

'It will be valuable in situations where a closer look at a hostile area or inside a contaminated building is crucial.

[...] If anything were to happen to the aircraft whether due to flat batteries, a crash or even a rolled-up newspaper, no matter - several cheap replacements could easily be carried.

The standard package will come with three aircraft, a pocket controller and a charger.

Also see Why Capitalism Is Amazing reasons one, two, three, four, and five.