Or where they'd used some low-yield weapons with short half-lives.

Shattered Union (2005): The District of Columbia is destroyed this year by a low-yield nuclear weapon.

The Bush administration, which requested the repeal, said it had no plans to develop a new low-yield nuclear weapon.

They argue that lifting the ban on low-yield nuclear weapons will only undermine America's ability to prevent the spread of such weapons to other countries.

It prohibited any research and development that could lead to the production a low-yield nuclear weapon.

Some would be relatively small, low-yield weapons that could be used against a variety of targets, ranging from mobile targets to underground bunkers.

There was even a low-yield weapon allocated to Port Said.

But the measure maintains the prohibition on development, production and acquisition of low-yield nuclear weapons.

Administration officials have also begun arguing that low-yield weapons might be more effective in deterring smaller countries from using or even developing unconventional weapons.

They say even low-yield nuclear weapons will release large amounts of radioactive debris.