Former Clinton era Defense Secretary Bill Perry clashes with Jim Miller who served as Under Secretary of Defense for Policy during the Obama administration. Perry says America does not need the triad.
The former military commander of America’s nuclear forces, Gen. James Cartwright (Ret.) says U.S. intercontinental ballistic missiles should be phased out.
See more behind-the-scenes photos from America’s nuclear stockpile.
Where is the balance between economic calculations that save more lives in the long-term and the individual human right to health care in the near?
China, the biggest emitter of greenhouse gases in the world, has paid a great environmental price for becoming the world's factory.
Paul Salopek brings PBS Newshour along on his "Out of Eden" journey along the ethnic fault lines of the southern Caucasus.
Paul Salopek makes a stop at one of the most important human migration sites outside of Africa. He is joined by PBS Newshour's Hari Sreenivasan.
Designing and building nuclear bombs is one of the U.S. government’s most secretive activities. Here's a photo tour of the updates under way on one of those weapons—the B61 bomb.
Background interviews by PBS NewsHour with experts and critics on the U.S.'s $8 billion plan to modernize the B-61 nuclear bomb.
An $8 billion modernization of the decades-old B-61 nuclear bomb will give it improved guidance and launch controls. Does that make it a "new" weapon?
In Indonesia—and around the world—the use of mercury in small-scale gold mining has tragic health consequences.
PBS NewsHour correspondent Margaret Warner sits down with Marvin Kalb, author of "Imperial Gamble" to discuss Vladimir Putin’s world view and his game plan for Ukraine.