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.
Twenty years after a genocide devastated the country, Rwanda has made a remarkable recovery and a new generation sees entrepreneurship, empowered by technology, as its patriotic duty.
As the Navy's fleet of nuclear-armed submarines approaches its lifespan, there’s debate over how many new ones are needed. PBS NewsHour looks at one of the most powerful weapons ever built.
Naval historian Norman Polmar says buying new nuclear-armed submarines is necessary to replace the aging ones in today's arsenal, but not in as many numbers as the Navy plans.
The Navy has called for spending $100 billion to replace 14 nuclear-armed subs with 12 new ones. But Joseph Cirincione, president of the Ploughshares Fund, says buying so many is overkill.
Replacing America’s 14 nuclear-armed submarines with 12 new ones is said to be the Navy's highest priority. Vice Admiral Michael Connor says that buying too few could tempt adversaries.
Onboard the USS Pennsylvania, one of 14 nuclear armed U.S. Navy subs, Commander John Cage talks about the challenges of captaining one of the most powerful weapon systems in America’s arsenal.