In Ukraine’s skies, flying low can mean the difference between life and death. Modern radars no longer miss aircraft “under the beam,” but line-of-sight limits and terrain masking still give pilots a ...

Rain, dust, trees, and even power lines — radar clutter creates a deadly game of hide-and-seek in the skies over Ukraine. By flying just 10 to 50 feet above the ground, helicopters and jets blend into ...