By David Lawder and Nandita Bose Reuters PITTSBURGH/WASHINGTON (Reuters) – The United States and European Union agreed on Wednesday to deepen transatlantic cooperation to strengthen semiconductor supply chains, curb China's non-market trade practices and take a more unified approach to regulating big, global technology firms. Launching a new forum, the U.S.-EU Trade and Technology Council, senior cabinet officials from both continents also pledged to cooperate on the screening of investments on export controls for sensitive dual-use technologies and on the development of artificial intelligence (AI). The statement did not mention China but said: "We stand together in continuing to protect…