CIA counterterrorism officers have signed up in growing numbers for a government-reimbursed, private insurance plan that would pay their civil judgments and legal expenses if they are sued or charged with criminal wrongdoing. The new enrollments reflect heightened anxiety at the CIA that officers may be vulnerable to accusations they were involved in abuse, torture, human rights violations and other misconduct, including wrongdoing related to the Sept. 11, 2001, attacks. The anxieties stem partly from public controversy about a system of secret CIA prisons in which detainees were subjected to harsh interrogation methods, including temperature extremes and simulated drowning. The White House contends the methods were legal, but some CIA officers have worried privately that they may have violated international law. Bush last week called for Congress to approve legislation drafted by the White House that would exempt CIA officers and other federal civilian officials from prosecution for humiliating and degrading terrorism suspects. Agency officials said that interest has been stoked over the years by the $2 million legal bill incurred by CIA officer Clair George before his 1992 conviction for lying to Congress about the Iran-contra arms sales; by the Justice Department's lengthy investigation of CIA officers for allegedly lying to Congress about the agency's role in shooting down a civilian aircraft in 2001 in Peru; and by other events. One former intelligence official said CIA officers have recently expressed concern that lawsuits will erupt if details of the agency's internal probe of wrongdoing related to the September 2001 attacks become public.