China : Chinese is expanding its Navy , investing in weapons . Officials worry China is trying to break into U.S. military secrets . ` ` Intrusions '' have already happened , officials say , though info was not classified . Pentagon : China 's lack of intelligence makes it hard to know the extent of activity .
Pentagon : Chinese military expanding its Navy , investing in weapons . Officials worry China is trying to hack into U.S. military computers . `` Intrusions '' have already happened , officials say , though info was not classified . Pentagon : China 's lack of transparency makes it hard to know the extent of activity .