As world leaders gather for third nuclear security summit, Japan's decision holds global political significance.
Russia was acting more like an adversary than a partner, NATO's Supreme Allied Commander Europe, U.S. Air Force General Philip Breedlove said, and the 28-nation alliance should rethink the positioning and readiness of its forces in eastern Europe.
NASA's Asteroid Redirect Mission is accepting proposal and will award $6 million for innovations in asteroid-capturing technology.
The Moscow stock exchange has lost nearly $70 billion this month as the U.S. and EU impose sanctions.
Obama's call for a deportation policy review is unnecessary to some advocates, who are still waiting for him to act unilaterally to stop deportations.
The EU has launched a new sanctions round against Russian officials, including Deputy P.M. Rogozin and Putin Advisor Sergey Glazyev.
Before the first White House Summit on Working families, the president urges Congress to pass the minimum-wage increase to help low-income women.
President Obama signed an executive order imposing more sanctions against Russian officials and Russia's financial sector.
Obama needs to re-read his own words and start acting on them.
After the first casualty of the Crimea conflict was announced Tuesday, Chuck Hagel offered his sympathies and urged Russia to leave the region.
Obama said the U.S. will push diplomatic efforts to bring pressure on Russia to loosen its grip on the Crimea region.
A Pew survey finds that Democrats are divided over whether to support the Keystone XL pipeline.
The website will be managed by NOAA and NASA while private corporations will contribute content and technology.
Republicans predict a "tsunami-type election" this fall. But Democrats think the biggest weapon they have is the Republican party itself.
This is not the first time that Putin's close aide and envoy on missile defense makes a controversial comment.
As the U.S. scales back defense spending from post-WWII highs, spending priorities are being scrutinized.
The Republican National Committee released ads spotlighting women and minorities, the majority of whom currently support Democrats.
An executive order by President Obama has targeted key advisers to President Putin.
With over half the votes counted, 95.5 percent had chosen the option of annexation by Moscow.
Thirteen years after 9/11, a terrorist is on trial in New York for making threats against Americans and recruiting Al Qaeda bombers.
If extreme Iran-style sanctions are imposed on Russian exports, the EU would be much more exposed than the U.S.
The former Secretary of State polls extremely highly in Iowa, beating other candidates by double-digit percentage points.