capable of destroying an aircraft carrier at sea. and china s j 31 fighter jet, a near replica of the u.s. f 35, the most expensive weapons program in pentagon history. the chinese version, some say, engineered with stolen u.s. technology. then a surprising announcement by the chinese president. an admission that the chinese economy, like the u.s., requires defense budget cuts. translator: i announced that china will cut its number of troops by 300,000. reporter: russian president vladimir putin watched from the stands. russia and china recently finished joint naval exercises in the sea of japan. their navys have been working together now for a couple of years. we ve got to remember going back to 2003 and the crisis in the syrian civil war, chinese and russian vessels sore sorteed together in the meditteranean as a warning to the united states and nato. reporter: off the state of georgia, a russian spy ship