About 11,000 pieces of bullets, grenades, bombs and other pieces of unexploded ordnance have been found since 1954, according to the Navy. There is no estimate as to how many pieces of unexploded ...

But Raytheon may be the closest yet, with a tiny guided missile a soldier can launch from a rifle-mounted grenade launcher. Meet the Pike, a 17-inch-long, laser-guided munition that Tucson-based ...