 CAT is a specialized tactical unit of the Secret Service, providing tactical support to the Presidential Protective Division; specializing in counter-ambush tactics and close-quarters combat (CQB).On April 29, 1993, The United States Department of the Treasury's Secretary Lloyd Benson and Assistant Secretary Of The Treasury for the Office of Enforcement, Ronald K. Noble, announced it's plans to examine the Bureau of Alcohol Tobacco and Firearm's (ATF) execution of search and arrest warrants for David Koresh and other Branch Davidians at their compound near Waco, Texas on February 28, 1993.Benson and Noble selected Merletti, then the Secret Service's Deputy Assistant Director, as the "Assistant Project Director" to oversee the investigative team charged with the analysis and assessment of whether ATF's procedures, policies, and practices were adequate and whether they were followed up until the time ATF decided to raid the compound.