Sentence:  As time has passed and science has progressed , the speed of military vehicles has increased , the range of missiles has been extended , the use of target-hunting noses on the <WSD>projectiles</WSD> has been adopted , and the range and breadth of message sending has increased . 
Meaning of the word marked with <WSD> tags:  a weapon that is forcibly thrown or projected at a targets but is not self-propelled