February 12, 2009 12:14 pm Navy Trains Marine Mammals to Track Threats The U.S. Navy may be nearing completion on plans to use sea lions and dolphins to catch underwater trespassers. US & World Videos 1:45 NYPD enters Columbia University in riot gear to clear protest 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 1:01 Biden administration plans to reclassify marijuana as a Schedule III drug 2:28 King Charles returns to public duties amid cancer diagnosis