As low-cost drones and autonomous weapons change the rules of warfare, India faces lessons from recent conflicts on how to adapt, deter and survive in a cheaper and deadlier battlefield.

ABOARD A B-52H STRATOFORTRESS — A B-52H Stratofortress’ hulking gray frame rumbles through the cloudless blue sky, closing in on targets 19,000 feet below. The plane’s weapon systems officer, Capt.

77 years ago this weekend, the United States dropped the first atomic bomb on the Japanese city of Hiroshima, snuffing out 70,000 lives in an instant and announcing the arrival of the atomic age. All ...

Russia has suspended its participation in its last remaining nuclear weapons treaty with the United States. Sixty years after the Cuban missile crisis, the world is once again holding its breath as we ...

When an assailant stormed a grocery store in Boulder, Colo., last month and fatally shot 10 people, the suspected weapon of choice — a Ruger AR-556 pistol — captured immediate attention. Not for what ...