DUBAI, United Arab Emirates (AP) — With a whirling buzz from 18 rotors, the pilotless helicopter gently lifted off the ground and soared up into the afternoon sky, the spire of the world's tallest building visible behind it….
DUBAI, United Arab Emirates (AP) — With a whirling buzz from 18 rotors, the pilotless helicopter gently lifted off the ground and soared up into the afternoon sky, the spire of the world's tallest building visible behind it….