Lifeboat Foundation

Formerly known as the “Air Mule,” this is a flying taxi, or maybe a future unmanned ambulance.

Urban Aeronautics

Nine years ago, the Air Mule was an almost-believable concept: a flying robot taxi that could get people out of dangerous battlefields without endangering a pilot or crew. It was the exact sort of gizmo one expects from Popular Science: an amazing machine of the future, almost like a flying car, that seemed plausible but just out of reach.