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.

Testing has shown the bullet can reach speeds of 2,400 feet per second. Researchers said they were confident the bullet could reach military speeds.