US Department of Defense

Democratic Sen. Mark Kelly has sued the Pentagon over attempts to punish him for his warnings about illegal orders. He's claiming the Trump administration trampled on his constitutional rights to free speech.

President Donald Trump instructed the Defense Department to “immediately begin” nuclear weapons testing last week. And that directive has been sending shock waves around the West.

The U.S. Department of Defense says it plans to restore content on the Navajo Code Talkers recently scrubbed from the agency's website.

"Multiple" Arizona National Guard members were wounded in a drone strike that killed three U.S. troops and injured dozens of others in northeast Jordan Sunday.

Arizona Congressman and former Navy SEAL Eli Crane was among only five Republicans to vote down consideration of a bill to fund the Department of Defense this week.

Gov. Doug Ducey is calling on the federal government to identify and treat groundwater contamination near four current and former military air bases in…

A North Dakota construction company favored by President Donald Trump has received the largest contract to date to build a section of Trump’s signature…

Arizona Gov. Doug Ducey has been appointed to a group that advises the White House on homeland security and national defense issues.Ducey was appointed by…

The House Natural Resources Committee will hold a hearing tomorrow on whether to end a uranium mining ban near the Grand Canyon. KNAU’s Ryan Heinsius…

Republican Senator John McCain has introduced legislation that would protect transgender people from being kicked out the military. It follows President…