It was individual citizens who identifed (and thwarted, in some cases) 9-11 terrorists by using their cell phones. The government didn't have a clue.
To have the government attempt to "make us safe" will not work, and will destroy freedom in America.
Maybe, but in times of war, the gov't has done a little better. Interring Italian-Americans and German-Americans who expressed solidarity with Fascist Italy and Nazi Germany actually worked pretty well.