This photo taken on January 7, 2010 shows a woman typing on the keyboard of her laptop computer in Beijing. China declared its Internet “open” on January 14 but defended censorship that has prompted Web giant Google to threaten to pull out of the country, sparking a potential new irritant in China-US relations. China employs a vast system of Web censorship dubbed the “Great Firewall of China” that blocks content such as political dissent, pornography and other information viewed as objectionable and the issue looks likely to shape up as the latest addition to a growing list of disputes between China and the United States over trade, climate change and human rights. AFP PHOTO / Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)