Following the issuance of the “wall” memo, which established procedures to regulate the flow of information from intelligence investigations by the FBI to local criminal prosecutors (see July 19, 1995), an additional information sharing “wall” is erected inside the FBI. After 9/11, the Justice Department’s Office of Inspector General will find, “Although it is unclear exactly when this ‘wall’ within the FBI began, [it was] sometime between 1995 and 1997.” This additional wall segregates FBI intelligence investigations from FBI criminal investigations and restricts the flow of information from agents on intelligence investigations to agents on criminal investigations, because of problems that may occur if the flow is not regulated (see Early 1980s). If an intelligence agent wants to “pass information over the wall” to a criminal agent, he should get approval from one of his superiors, either locally or at FBI headquarters. A description of wall procedures comes to be commonplace in all warrant requests filed under the Foreign Intelligence Surveillance Act (FISA). [US Department of Justice, 11/2004, pp. 30-32 ] However, FBI agents often ignore these restrictions and over a hundred cases where information is shared without permission between intelligence and criminal FBI agents will later be uncovered (see Summer-October 2000 and March 2001).