Simplify the following text for a Grade 11 native English-speaking person.
Original: According to Debka.com ( an Israeli intelligence website ) , his intention with the 11 March 2004 Madrid attacks was to damage Spain 's `` psyche '' in order to influence elections and to start a domino effect which would eventually affect Britain 's Tony Blair , Italy 's Silvio Berlusconi , and the United States President George W. Bush .
Simplified: His intention with the 11 March 2004 Madrid attacks was to damage Spain 's `` psyche '' in order to influence elections and to start a domino effect which would eventually affect Britain 's Tony Blair , Italy 's Silvio Berlusconi , and the U.S. President George W. Bush .