When the government warns you about something you know nothing is going to happen. Does the government let you know before a terrorist attack? NO.
This is just psychological mind game to create fear, they did the same thing in luxembourg, government sent leaflet to everyone telling them to prepare for nuclear war and its happening in the US too when obama says be prepared for a catastrophic event.
The end game is nothing but a world government, when people fear there could be a war there will be ready to accept any changes to "prevent" this war.