Three diminutive single-engine unmanned propeller planes were found in March and April . They look like hobby shop model airplanes with consumer cameras shoved into them . North Korea has flaunted similar , larger UAVs at military parades in recent years , and some of them have been spiked with explosives , Hardy said . The aircraft are not equipped to fly, but they can be used as a drone for surveillance or reconnaissance purposes. Spring is typically a time of high provocations between North and South Korea .
Three diminutive single-engine unmanned propeller planes were found in March and April . They look like hobby shop model airplanes with consumer cameras shoved into them . The aircraft are not equipped to fly, but they can be used as a drone for surveillance or reconnaissance purposes. Spring is typically a time of high provocations between North and South Korea .