Russian news reports say the Russian nuclear submarine Kursk, which sank to the bottom of the Barents Sea over the weekend, was involved in a major collision, but Pentagon spokesman Rear Adm. Craig Quigley told InsideDefense.com there are no indications the Kursk collided with another sub. Asked directly if a U.S. sub collided with the Oscar-class Kursk, Quigley said, "To the best of my knowledge, no." Quigley said he had no information indicating Kursk hit another submarine before sinking to...