Bruce Schneier describes the difference:
Unfortunately for politicians, the security measures that work are largely invisible. Such measures include enhancing the intelligence-gathering abilities of the secret services, hiring cultural experts and Arabic translators, building bridges with Islamic communities both nationally and internationally, funding police capabilities both investigative arms to prevent terrorist attacks, and emergency communications systems for after attacks occur and arresting terrorist plotters without media fanfare. They do not include expansive new police or spying laws. Our police don't need any new laws to deal with terrorism; rather, they need apolitical funding. These security measures don't make good television, and they don't help, come re-election time. But they work, addressing the reality of security instead of the feeling.