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 .
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 . They do n't have strong military or spy capabilities , but they made it through air defenses . Spring is typically a time of high provocations between North and South Korea .