The Federal Bureau of Investigation may have bigger things to worry about than law enforcement. Foreign Policy is reporting a change in the bureaus latest fact sheet, in which the agencys primary mission has changed from law enforcement to national security. Its in keeping with the bureaus post-9/11 duties as the nations primary domestic counterterrorism agency, but the timing has many FBI-watchers scratching their heads. Whats changed in the last year to make the bureau shift away from law enforcement? The bureau has long been part of the National Security wing of the government, as distinct from purely civilian agencies like the Department of Agriculture, but its primary purpose was always seen as one of enforcing the laws of the nation.