Security: Computer security experts testify that the unfinished health care marketplace portal places the personal information of millions at risk on a poorly designed and built site that is a hacker's dream. Not only is the poorly designed and still only partially built ObamaCare website, Healthcare.gov, vulnerable to attack by computer hackers, it already may have been comprised, cybersecurity expert David Kennedy told a House Science, Space, & Technology Committee hearing on Tuesday. "Hackers are definitely after it," said Kennedy, CEO of data security firm Trusted SEC. "And if I had to guess, based on what I can see ......