THE PENTAGON developed GPS munitions to overcome the limitations of previous-generation precision weapons, mainly Vietnam-era laser-guided bombs, which are still in use.

• 五角大厦发展GPS炸弹是为了要克服上一世代精准武器的极限，主要是指越战时期的雷射导引炸弹，这种炸弹到目前为止还在使用。