PYONGYANG, North Korea - File photo shows a North Korean unmanned air vehicle shown for the first time during a military parade in Kim Il Sung Square in Pyongyang on April 15, 2012. North Korea on March 20, 2013, staged unmanned combat air vehicle and anti-cruise missile "rocket" exercises in the presence of the country's leader Kim Jong Un, the North's official Korean Central News Agency reported. (Kyodo)