Critics have made a number of claims about the defense secretary and his department since the beginning of the Iran war.

Funding for defense startups has ballooned in recent years as militaries scramble to modernize.

The U.S. and Israel say they've depleted most of Iran's missile arsenal, but its weapons — including controversial cluster munitions — are challenging even the most advanced air-defense systems.

President Donald Trump called for defense spending to be raised to $1.5 trillion, a 50% increase over the current budget. "After long and difficult negotiations with Senators, Congressmen, Secretaries, and other Political Representatives, I have determined ...

The massive annual defense bill up for consideration this week infuses billions of dollars into various defense and intelligence agencies’ cybersecurity portfolios, a sign that cyber threats from foreign adversaries are now a regularly occurring ...

Missile interceptors made by the South Korean firm LIG Nex1 are said to be performing well, at a small fraction of the cost of U.S. interceptors.

Defense Minister Ahn Gyu-back on Thursday held talks with a delegation of U.S. Senate lawmakers visiting South Korea and discussed ways to improve the Seoul-Washington alliance, the defense ministry said.

Chicago Bears general manager Ryan Poles explains what type of defensive players the team is looking to add this offseason.