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We have to remain vigilant, and we have to continue to take the fight to the terrorist.

This past year has been very turbulent for the Middle East, and my conversation with Prime Minister Netanyahu strengthened my belief that we need to remain vigilant in our support of our critical ally.

Doubt must be no more than vigilance, otherwise it can become dangerous.

We must be vigilant in our actions towards criminals, and innovative in our approach towards solving crime.

Given Ivan's size and power, we must remain vigilant.

To the American people I say, awaken to what is happening. It is the duty of each citizen to be vigilant, to protect liberty, to speak out, left and right and disagree lest be trampled underfoot by misguided zealotry and extreme partisanship.

In these troubled times we live in, we should remain vigilant and see through populist arguments.

Remaining vigilant toward this ever-present threat means constantly learning how better to protect ourselves. But primarily it reminds us that we must fight and win the war on terror, so that we do not have to fight it here in America.

Our progress against malaria is impressive. But vigilance remains a critical ingredient to protect the health of all people.

While America has always been and always will be a safe harbor for those being persecuted by tyrannical governments we must be vigilant to ensure those individuals are not taking advantage of America's generosity and good will.