The Navy is aiming its focus on successfully fielding unmanned systems -- particularly unmanned underwater vehicles -- officials said Thursday, with another demonstration of the Manta Ray program potentially planned soon. The Manta Ray UUV prototype completed its full-scale, in-water testing in February and March, which Kyle Woerner -- the Defense Advanced Research Projects Agency's Manta Ray program manager -- called “successful” at the time. This program is almost completed now, and another demonstration may occur, Greg Avicola, another DARPA...