If the main base shuts down from an outside attack, the dishes take over their own programming.

There'll be some fifty, sixty people here even if the rest were drawn off by the outside attack.

Every prison they surveyed had systems that were vulnerable to outside attacks.

And we know they were protected from outside attack.

It had taken the distraction of an outside attack.

For a while I worried about outside attack, because all our weapons had turned to junk.

He himself formed one of the most formidable barriers against outside attack.

"No such exposure to outside attack has ever before been made by a great and rich city," The Times wrote.

In the meantime, the island is vulnerable to outside attack.

Just how could a planet or a space colony defend itself from outside attack?