Luigi Mangione faces a key New York court hearing over whether gun, notebook and arrest evidence can be used against him.

Global arms sales have surged to unprecedented levels, with the world’s 100 largest weapons and military services companies ...

Demand for military equipment has swelled, as have the budgets many nations have at their disposal for their militaries.

In the era of sophisticated long-range air-to-air missiles, cannons on aircraft may seem quaint—but they still serve a vital purpose.