<div dir="ltr"><div>This looks like someone is thinking about weaponized quadcopters.</div><div><br></div><a href="https://techxplore.com/news/2022-05-quadcopter-air-underwater-suction-cup.htm">https://techxplore.com/news/2022-05-quadcopter-air-underwater-suction-cup.htm</a><br></div>