South Korea suspects that three drones discovered in recent weeks belong to North Korea . The unmanned aircraft are fitted with digital cameras , difficult to detect with radar . `` You get one use out of it . '' Hide Caption 1 of 10 Photos:Photos: Seoul is bolstering its air defense network in light of the discovery .
South Korea suspects that three drones discovered in recent weeks belong to North Korea . The unmanned aircraft are fitted with digital cameras , difficult to detect with radar . Hide Caption 1 of 10 Photos:Photos: Seoul is bolstering its air defense network in light of the discovery .