Computer Hackers can get into the Pentagon??

I am always worried about ordering things off the computer or typing in any of my information because of all the hacking incidents I hear about. In the back of my mind I think what are the odds of it happening to me but the truth is it is very possible it could. I recently heard about three Chinese guys that claimed to have hacked into the pentagon computer and downloaded information. Whether or not I believe them I don't know but I do know that they are able to hack into most computers as long as they know a little bit about the software. I was reading an article on CNN.com where they had an interview with these three hackers. The leader of the group is named Xiao Chen and he has two colleagues that he works with. One is a former computer operator, another is a marketing graduate and the Chen says he is self-taught. If they are telling the truth and have gotten into the Pentagon computers they have a lot of power. The government is worried that they will try to carry out "cyber warfare". The pentagon said that the computer networks in many countries including the U.S, Germany, Britain and France have had intrusions that originated in China. Who knows how many of these hackers are out there right now trying to get information that could do a lot of damage to our government. Not to mention Xiao Chen and his colleagues have a website of their own that gives directions and advice about how to get into computers, so that means we are all at risk!