What Pakistan has unwittingly memorialized is a new nuclear era.

A sense of awe, mingled with something like shame, characterized the first nuclear era.

The reactor worked without a hitch, and the nuclear era was born.

He helped perfect the world's first nuclear reactor, which marked the beginning of the nuclear era.

For the first 20 years of the nuclear era, reactor designers insisted that bigger was better.

The reliability issue goes back to the earliest days of the nuclear era.

While the end of the nuclear era may be at hand, however, old ideas die hard.

High noon in the nuclear era, and some band had called itself Meltdown!

In the present nuclear era, the controversy still rages.

Any oil painting made in the nuclear era will show traces of caesium- 137 and strontium-90.