The president's strategy affirms that the doctrine of preemption remains sound and must remain an integral part of our national security strategy. If necessary, the strategy states, under longstanding principles of self defense, we do not rule out the use of force before attacks occur, even if uncertainty remains as to the time and place of the enemy's attack.  -   Stephen Hadley     Quotes
The president's strategy affirms that the doctrine of preemption remains sound and must remain an integral part of our national security strategy. If necessary, the strategy states, under longstanding principles of self defense, we do not rule out the use of force before attacks occur, even if uncertainty remains as to the time and place of the enemy's attack. Stephen Hadley
 Doctrine