Six years after the Bush administration declared war on al-Qaeda, the terrorist network is gaining strength and has established a safe haven in remote tribal areas of western Pakistan for training and planning attacks, according to a new Bush administration intelligence report to be discussed today at a White House meeting.The report, a five-page threat assessment compiled by the National Counterterrorism Center, is titled "Al-Qaida Better Positioned to Strike the West," intelligence officials said. It concludes that the group has significantly rebuilt itself despite concerted U.S. attempts to smash the network.