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Civil Air Patrol to fly over Humboldt, Del Norte counties on Saturday for loudspeaker testing

The flight is an exercise to train personnel and test loudspeakers that might be used in a distant-source tsunami warning ...
Interesting Engineering

World’s first free-flying light sail deployed by US students for sun-powered propulsion

A Cornell student's light sail, which weighs only 0.2 pounds, was released from the International Space Station by astronauts ...