The European Union's new justice chief says she is not convinced that European governments' transfer of personal banking data to U.S. authorities is necessary or effective in the fight against terrorism. The EU must this year renegotiate a controversial agreement to hand over huge amounts of banking information on Europeans that the U.S. says has given them some key leads in terrorist investigations. Viviane Reding also says in a Thursday speech that body scanners could invade personal privacy and were not proven to be useful. She says she cannot imagine the EU would use them widely without full consideration of their impact on health and personal privacy. 