Something that’s definitely bad for business: Chinese hackers. A group of Chinese hackers attacked the U.S. Chamber of Commerce, the country’s largest pro-business lobby, in 2009 and 2010, according to The Wall Street Journal. The hackers apparently gained access to everything stored on the lobby’s systems, including information about its 3 million members. They honed in on the work of four Chamber employees who worked on Asia policy and stole six weeks of their emails. It is possible that the hackers had access to the Chamber’s network for more than a year when the breach was discovered and shut down in May 2010. Since then, the Chamber has overhauled its security system.