A DARPA-funded project has successfully demonstrated a .50-caliber sniper round capable of maneuvering during flight in order to maintain a fix on its target. Called EXACTO, the bullet is optically guided to the target by a laser, allowing for accuracy up to 1.2 miles away. Headshots will never be the same.
There was a time when increasing the distance between yourself and a sharp shooter bent on your extermination would significantly improve your chances of survival. But that time is coming to an end.
The EXACTO (EXtreme ACcuracy Tasked Ordnance) rifle will conceivably be able to fire accurately at far longer distances than are possible now by combating weather with self-guiding bullets. Yes, you read that right.