The European Union is determined to fight terrorism, and closer cooperation is key to thwarting new attacks, top European Union officials said Monday, the fifth anniversary of the Sept. 11, 2001, attacks. European Commission President Jose Manuel Barroso said Europe was "more determined than ever to tackle the causes and the consequences of global terrorism." EU Justice and Home Affairs Commissioner Franco Frattini in a letter to his US counterpart, Homeland Security Secretary Michael Chertoff, said the EU was "better prepared to respond than we were five years ago," but said that the foiling in August of a terror plot to blow up trans-Atlantic flights showed that more cooperation was needed. He said issues such as preventing the radicalization of youth, monitoring the use of the Internet by terrorists and the prevention and detection of the misuse of explosives were new priorities. Frattini also urged the US to agree quickly to a new interim security deal on the transfer of passenger data from trans-Atlantic flights. EU and American negotiators will meet again this week to continue talks to rescue a passenger data deal, which is intended to fight terrorism.