A hacking group believed to have links to the Chinese government penetrated the Metropolitan Transportation Authority’s computer systems in April, exposing vulnerabilities in a vast transportation network that carries millions of people every day, according to an M.T.A. document that outlined the breach. The hackers did not gain access to systems that control train cars and rider safety was not at risk, transit officials said, adding that the intrusion appeared to have done little, if any, damage.
Read the article: The New York Times
