You've got to make sure we're constantly vigilant because we're at war.

Do we not need to be constantly vigilant?

"We have to be constantly vigilant of the balance."

Criminals look for every opportunity to attack, so all travelers should remain constantly vigilant.

He had to be constantly vigilant with technicians to ensure the designs were completed with perfect accuracy.

The forces of civilisation need to remain constantly vigilant.

I think more Americans can identify with ground zero than Baghdad, and that this is the reason we have to be constantly vigilant.

I had to be constantly vigilant, never letting Olivia's hand go for more than a minute.

To be worthy of its favored status, sport needs to be constantly vigilant.

At the team's first meeting, he told the players to be constantly vigilant about their actions.