Last week,President Obama and Russian President Dmitri Medvedev signed a nuclear arms agreement in the Czech Republic.

VOA: special.2010.04.17

People can get cancer from low doses of ionizing radiation, the kind released in a nuclear accident.

VOA: special.2011.03.16

"I firmly believe it is in Iran's interest not to develop nuclear weapons, because it would trigger a nuclear arms race in the Middle East and be profoundly destabilizing in all sorts of ways."

VOA: special.2009.05.23

Israel is believed to have a nuclear arsenal, but has not signed the Nuclear Non-Proliferation Treaty and is not subject to international inspections.

VOA: standard.2010.04.11

In a real nuclear attack, hundreds of thousands of people would have to be decontaminated from radiation.

VOA: standard.2010.07.21

The IAEA chief acknowledged Israel's concerns about a nuclear armed Iran or any other hostile country.

VOA: standard.2009.11.04

Secretary Gates said if Iran develops a nuclear weapon, it would likely spark a nuclear arms race in the Middle East, creating more dangers for Iran than it has now.

VOA: standard.2009.12.12

"As the only nuclear power to have used a nuclear weapon, the United States has a moral responsibility to act.

VOA: special.2009.04.11

Western nations are concerned that Iran could use the missile technology to launch a nuclear weapon, which Iran is suspected of building.

VOA: special.2009.02.07

The base played a part in the nuclear tensions between the United States and the Soviet Union.

VOA: special.2009.06.30

They increased economic actions against North Korea after it launched missiles and tested a nuclear device.

VOA: special.2009.08.08

The president said groups like al-Qaida would surely use a nuclear weapon if they got one.

VOA: special.2010.04.17

President Obama and Prime Minister Netanyahu both spoke of the threat of a nuclear-armed Iran.

VOA: special.2009.05.23

Dr.Giuseppe Esposito is a nuclear medicine expert at Georgetown University Medical Center in Washington.

VOA: special.2011.03.02

Other wishes included working for a nuclear-free Korea and to defeat extremists in Afghanistan.

VOA: special.2009.09.05

In Washington, a military intelligence official told a Senate committee that Iran could be one year away from producing enough highly-enriched uranium for a nuclear weapon.

VOA: special.2010.04.17

It calls for America and Russia to each deploy a limit of one thousand five hundred fifty long-distance nuclear weapons -- a cut of about thirty percent.

VOA: special.2010.04.17

She was a top nuclear physicist who made many important discoveries.

VOA: special.2010.03.03