In Caddell Constr. Co., Inc., B-401596, et al, Sept. 21, 2009, the GAO sustained a protest against the pre-qualification of a vendor on the grounds that the Department of State’s (DOS) determination that the vendor satisfied the qualification requirements of the Omnibus Diplomatic Security and Antiterrorism Act of 1986 (Security Act) was unreasonable. The GAO recommended that the DOS withdraw the pre-qualification, concluding that the vendor did not have the necessary experience required by the Security Act. This recommendation rejected the DOS’s method of aggregating dollar values to determine an offeror’s qualification under the statute.