Who doesn't like a good birds-eye view? Likely not the guys growing pot below. Astute viewers watching helicopter coverage of Spain's La Vuelta bicycle race Saturday alerted police to the rooftop plantation. Reuters reports police seized 40 plants Tuesday in the town of Igualada - about 43 miles from Barcelona. Growing marijuana for personal use is legal in Spain. However, buying and selling remains a no-no. No arrests have been made. What's the most interesting thing you've seen from an aerial view? With more drones operating, are you concerned with privacy in your own backyard? How high should private airspace extend?