US Army patents bullet that self-destructs to protect civilians
 

The .50 caliber bullet is one of the biggest projectiles you can fit in a rifle or machine gun. Its size and range makes it super-effective at neutralizing foes over long distances, but because it also takes a lot to stop, it can still harm or kill i...

http://www.engadget.com/2016/02/23/u...ucting-bullet/