Sami managed to keep his wits about him.

I get on. I tend to be a little bit vigilant when I get on the subway.

The Security Council will remain vigilant to ensure that there is no impunity.

The Council remains vigilant with regard to cases of sexual abuse committed by United Nations personnel.

As long as terrorists and others remain determined to acquire weapons of mass destruction, the international community must remain vigilant against the threat of proliferation of nuclear weapons.