These were planned for use against the four known fixed-radar defense sites along the flight route.

Construction works continued throughout the war building bunkers, field fortifications, barbed wire fences and air defense sites.

Would that mean only one defense site, as now permitted by the Antiballistic Missile Treaty?

GTL employees span the globe working at military, Lockheed, and other defense sites.

And wouldn't something like a defense site be relatively "unbuilt," with most of its facilities underground?

This became Fort MacArthur in 1914 and was a coastal defense site for many years.

The next day, Wiltsie and two other ships conducted a "reactive strike" on the coastal defense site, pounding it with 5-inch gunfire.

The Libyan coastal air defense sites were all around them, but right now they were quiet-no radar emissions at all.

A coastal defense site, Battery Kirby, separates the campground from the beach.

Owned in the 1770s by Samuel Ellis, it was an important coastal defense site during the War of 1812.