The WWF has also developed pilotless special drone aircraft to detect poachers, locate forest fires and detect illegal felling of trees.

BBC: Nepal's rhino hunters become the hunted

It says the two leaders will agree on plans to build a new generation of pilotless "fighter drone" aircraft.

BBC: Papers

Gortney said a surface-to-air missile threat would have to be eliminate before pilotless aircraft such as the Global Hawk drone could fly missions to see how successful the strikes have been.

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