31.   Part of the exercises involved firing on unmanned aircraft, or drones.

32.   Part of the exercise involved firing on an unmanned aircraft.

33.   A leader in eastern Afghanistan said Thursday said seven suspected al-Qaida members were killed by a missile fired by an unmanned U.S. aircraft.

34.   A Turkish company said Friday it has produced unmanned aircraft using technology from an Israeli firm.

35.   Amid heightened tension in the Gulf, Iran said Wednesday it was tracking the movements of U.S. Navy ships with a new unmanned aircraft that could evade radar detection.

36.   Also at work are unmanned Predator aircraft, which fly much lower than the Global Hawk and provide real-time video images of ground targets.

37.   An unmanned aircraft fires laser guns guided by radar that can see through rain, sleet, snow and foliage.

38.   An unmanned experimental NASA aircraft being tested for environmental research crash landed in the Mojave Desert on Friday, sustaining moderate damage and partially blocking a highway.

39.   An unmanned NATO reconnaissance aircraft crashed in northern Bosnia, NATO officials said Wednesday.

40.   For the first time, U.S. officials acknowledged they had lost an unmanned aircraft.