Drone carrying radioactive materials failed to attain goals

Drone carrying radioactive materials failed to attain goals

The drone found on the rooftop of the Prime Minister's Office last week in Chiyoda Ward, Tokyo, probably crashed during a U-turn to the parking lot from where it was being operated, according to the suspect's blog.

On April 9, the small drone allegedly controlled by Yasuo Yamamoto was presumed to have taken off from the parking lot 200 meters from the office and flown over the building's roof. But the aircraft probably crashed while making a U-turn to the parking lot after flying toward the facility's front yard.

According to his blog and other sources, Yamamoto started up the drone around 3:30 a.m. from a parking lot next to Sotobori-dori avenue. He was aiming to fly the drone to the central courtyard of the office, but he targeted the front yard instead because the monitor "became impossible to see ... [it was] pitch-black." He lost control of the drone after it "descended toward the light coming from the front yard."

After watching news reports about the drone on Wednesday, Yamamoto wrote on his blog that the fact the drone was found "on the roof means its HOME function was working."

According to drone dealers, drones have a built-in function of automatically returning to their departure point when they are on the verge of losing power. When viewed from the parking lot, the site of the drone's crash is on the side of the parking lot rather than the courtyard and the front yard. The drone could have crashed en route to its takeoff point.

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