The CIA is squelching publication of a new book detailing events leading up to Osama bin Laden's escape from his Tora Bora mountain stronghold during the U.S.-led invasion of Afghanistan, says a former CIA officer who led much of the fighting. In a story he says he resigned from the agency to tell, Gary Berntsen recounts the attacks he coordinated at the peak of the fighting in eastern Afghanistan in late 2001, including how U.S. commanders knew bin Laden was in the rugged mountains near the Pakistani border and the al Qaeda leader's much-discussed getaway. During the 2004 election, President Bush and other senior administration officials repeatedly said that commanders did not know whether bin Laden was at Tora Bora when U.S. and allied Afghan forces attacked there in 2001. A Republican and avid Bush supporter, Berntsen, 48, retired in June and hasn't spoken publicly before. Berntsen's book is one of a handful written recently by former CIA officers who have wrestled with the agency over what could be published.