"It will be difficult for your people to approach without detection," he challenged.

How did it get so close to my battle group without detection?

He might even pass out of the palace and the city without detection.

To stand down these bears takes a lot out of us, so we've tried to move past them without detection.

It would now be impossible to open the instruments without detection.

While the ability to watch the actions of others without detection was useful, he didn't absolutely need it now.

How do you train thousands of troops at night without detection?

No one could approach the facility without detection by external security forces.

Instead he said: "I don't see how you've been able to hide out without detection this long."

All was clear; so far they had moved without detection.