Working with other conspirators, he was said to have conducted surveillance of the embassy three days before the bombing.

He said the Americans had told him they were not able to conduct such surveillance on their own, because it would be too conspicuous.

This moon is a logical place to conduct such surveillance.

During the cold war, attack submarines conducted regular surveillance off the Russian coast.

Investigators have been concerned for years that changing communications technology could damage their ability to conduct surveillance.

The military has been conducting surveillance of the Afghan airspace.

There was no good reason for the country not to conduct surveillance on an American battle group in their pond.

Its primary objective is to provide intelligence to maintain air superiority and conduct surveillance.

These include conducting surveillance of targets, planning an operation and carrying out an actual attack.

Credible sources reported that state security officers often attended Protestant services to conduct surveillance.