Various dead-end approaches were tried and then discarded: ordnance packages for dropships, remote semi-autonomous drones, and airborne artillery platforms, to name but a few.

• 对各种接近死胡同方法进行了审判，然后丢弃：给运输机装上弹药包，远程半自动的无人驾驶飞机，大炮和空中平台，仅举几个例子。