A judge on Tuesday ordered the release of secret grand jury testimony in the spy trial of Julius and Ethel Rosenberg, citing its value to historians in the debate over national security vs. freedom.

The European Union tightened trade sanctions against Iran Friday for defying a long-standing international demand to freeze uranium enrichment.

U.S. Secretary of State Condoleezza Rice accused Iran on Monday of using stalling tactics and warned Tehran it faced more sanctions if it flouted a two-week deadline to curb its nuclear program.

In the first speech to the Israeli Knesset by a British prime minister, Gordon Brown on Monday will warn Iran it faces growing isolation if it rejects an offer from major powers on its disputed nuclear program.

North Korea is widely expected to hand China a long-delayed account of its shadowy nuclear activities on Thursday, a key step that could see it removed from Washington's list of terrorist states as well as win it diplomatic recognition and desperately needed fuel.

Nuclear power may indeed be poised for a renaissance as many in the industry hope, but there have been false promises in the past.

Pakistan's A.Q. Khan on Tuesday denied a report that his network may have shared blueprints for an advanced nuclear weapon with countries such as Iran and North Korea.

In an extraordinary shake-up, the Air Force's top uniformed and civilian officials are leaving their jobs, U.S. officials said Thursday.

Gaining ground this political season is a proposed League of Democracies designed to strengthen support for the next president's overseas agenda and ensure a global leadership role for the United States.

The GOP presidential candidate called for talks with China to negotiate a temporary halt to production of nuclear weapons-grade material and with Russia on a new treaty to destroy more nuclear weapons.