The trial often involves test explosion of a prototype.

But all of those bombs were developed with the aid of extensive test explosions.

The safety board also plans to conduct more test explosions in a one-fourth scale model.

Some experts outside the Government have repeatedly questioned the need for such test explosions.

It was used by controllers to trigger and monitor nuclear test explosions.

Operation Mandrel was a series of 53 nuclear test explosions conducted in 1969 and 1970.

Weapons experts believe that Iraq must surmount another major problem - the test explosion of a nuclear device.

Last night I saw a TV play about a nuclear test explosion.

In 1949, the system uncovered the first test explosion.

The last American nuclear test explosion sent radioactivity into the atmosphere in 1962.