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It is not known if the pointers damaged the drone's camera, rendering it unflyable, or if the operator could still fly the drone but decided to land it.
A video posted by Perseus999 includes this commentary from him or her:
This is the moment a police drones is being forced to crash and land by protesters in Chile using simple pointer lasers to blind the drone.
These protesters didn't use any physical or gun force to bring the drone down. Instead, they used another form of technology: lasers. A lot of bright green laser beams were pointed in unison at the drone, which can be seen moving erratically, before quickly falling down to Earth.
A few theories about how the drone was brought down by the lasers are floating around many social media. Some believe the lasers are powerful enough to melt the plastic on the drone if it is a cheap drone. Some others believe the lasers' lights would blind the drone operator's vision through the camera, and the drone would go into autopilot mode and land as a failsafe. Others think that with that many lasers pointing at the drone, it would overheat and malfunction. Speculations that between 40 to 50 lasers were being pointed at the drone have circulated online, and the video certainly demonstrates that these estimates may be true. If that is the case, that's certainly enough lasers to blind the drone's camera lens.
Videos found from @Emily_Lykos | @Carabdechile
COMMENTARY FROM LASERPOINTERSAFETY.COM: The overheating theories are probably incorrect. Cameras are known to be sensitive to laser light — often much more sensitive than human eyes. So the camera sensor could be damaged, or even if not damaged, causing glare making it difficult or impossible to safely fly.
Via a YouTube search for "Drone with laser pointer"
During the disorder, young teens threw dozens of petrol bombs, paint bombs, bricks and bottles at police patrols, and burned a barricade. It was the third night of the incidents when the PSNI helicopter was targeted.
From ITV News, Derry Journal
Stephen Ruth said he was not home at the time, that no one aimed a laser beam from his property, and that police are targeting him. “I find it very suspicious the commissioner would accuse me when the same day I attempted to form an anti-corruption taskforce in the county.”
Police said they “have no doubt the laser came from that home” in the December 6 2017 incident. The helicopter had been looking for a missing teenager.
Ruth had previously mis-aimed red light cameras, and cut wiring in about 20-30 systems, to protest what he called an unsafe money grab by Suffolk County. He said only a jury could give him a fair hearing.
From CBS New York, laser story and earlier story on red light damage.
Seventy-four other police officers were injured; one was hospitalized with an eye injury after a firework exploded in his face.
From the Mirror and Reuters
UPDATED JULY 9 2017 - After intensive investigations, German police arrested a 27-year-old Hamburg man “on suspicion of attempted murder”. The unnamed man blinded the two pilots “so badly while they were up in the air that they had to stop working because they couldn’t see.”
The first incident occurred August 17 2016 at about 5:15 am. The light went into the pilot’s eye, leaving his vision “dangerously obstructed”, according to Cecily Fong, public information officer of the North Dakota Department of Emergency Services.
The second incident happened on August 21 2016 at about 12:45 am. The pilot looked away in time to avoid the laser light, according to the Morton County Sheriff’s department.
News reports are unclear, but it appears the same aircraft and same pilot were involved in both incidents.
The flights were being done by the North Dakota Highway Patrol to monitor approximately 3,000 persons — most Native American tribal members — who wanted to block construction of the pipeline until a court hearing could take place over its impact to sacred sites and culturally important landscapes.
The Federal Bureau of Investigation was called in to try and find the laser perpetrator(s).
Tara Houska, speaking on behalf of Honor the Earth, a non-profit organization supporting indigenous peoples’ environmental justice, said “Why launch a federal investigation into a laser pointer instead of asking what right the U.S. government has to fly surveillance planes over sovereign nations in the first place?”
From KELOland TV, Snopes, Forum News Service, Belleville News-Democrat and Intercontinental Cry magazine
Complete coverage, including more photos and videos, is in this LaserPointerSafety.com story in the “Statistics, laws, all other news” section.