The U.S. Navy and Coast Guard have expressed interest in the 30-ft.-long Protector, which comes mounted with a machine gun and could be retrofitted for commercial use. Robots versus pirates -- it's not as stupid, or unlikely, as it sounds. Piracy has exploded in the waters near Somalia, where this past week United States warships have fired on two pirate skiffs, and are currently in pursuit of a hijacked Japanese-owned vessel. At least four other ships in the region remain under pirate control, and the problem appears to be going global: The International Maritime Bureau is tracking a 14-percent increase...