NEW : Europe aide says tape tries to justify `` slaughter of innocent people '' Tape allegedly of bin Laden claims Al Jazeera behind terror attempt . `` Afghanistan will not dream of enjoying safety '' bin Laden purportedly says . CNN could not independently confirm the authenticity of the message , but the CIA has in the past confirmed Al-Jazeera reports on tapes from the al Qaeda leader . Tape aired on the Arabic -language news Web site Al Jazeera .
NEW : Europe aide says tape tries to justify `` slaughter of innocent people '' Tape allegedly of bin Laden claims Al Jazeera behind terror attempt . `` Afghanistan will not dream of enjoying safety '' bin Laden purportedly says . Tape aired on the Arabic -language news Web site Al Jazeera .