Europe Moves to Shield Citizens’ Data --- BRUSSELS — Lawmakers here have introduced a measure in the European Parliament that could require American companies like Google and Yahoo to seek clearance from European officials before complying with United States warrants seeking private data. -- The measure, an amendment to a broader electronic privacy law pending in Parliament, is a response to Prism, the secret spying program led by the National Security Agency that came to light in June. Europeans were outraged by the revelations that some of the biggest American Internet companies, many of whose users live in Europe, were required by the United States authorities to share information in e-mail, Web searches and other online data. nytimes