Bullet steers itself to target

US scientists have invented a bullet that steers itself like a miniature guided missile and can hit a target more than a mile away.

It twists and turns to guide itself toward a laser-directed point, making up to 30 corrections per second while in the air.

Sandia National Laboratories spokesman Jim Jones said he thinks the .50-calibre bullets would work well with military machine guns, so soldiers could hit their mark faster and with precision.