The planning for the firings is at an early stage after Trump's Nov. 5 election victory and could change as Trump's administration takes shape
US President Donald Trump approves sending American troops to bolster Saudi Arabia’s air and missile defenses after the largest-ever attack on the kingdom’s oil facilities, which Washington has squarely blamed on Iran.
President Donald Trump drops his choice of John Ratcliffe to be US spy chief after questions arose about the congressman's lack of experience and possible exaggerations in his resume, marking the latest upheaval over a top national security post.
The White House’s national security team last fall asked the Pentagon to provide it with options for striking Iran after a group of militants aligned with Tehran fired mortars into an area in Baghdad that is home to the US Embassy, a source familiar with the matter says.
At last the Pentagon has acknowledged funding a secret multi-million-dollar programme to investigate sightings of Unidentified Flying Objects (UFO).
Fifteen Guantanamo Bay detainees are transferred to the United Arab Emirates, the largest such release in years, the Pentagon announces.
High school student David Dworken spends 10 to 15 hours between classes on his laptop, hacking US Defense Department websites, and gets praised for finding vulnerabilities.
Two Chinese fighters have carried out an "unsafe" intercept of a US military aircraft over the South China Sea, the Pentagon says.
A key leader of so-called Islamic State (IS) in Iraq's Anbar province has been killed in a coalition air strike, the Pentagon says.
The US Department of Defense invites vetted hackers to test its cybersecurity under a pilot program that is the first of its kind in the federal government.
The Pentagon is expanding its cyber war against Islamic State computer networks, senior defense officials say as they claimed to have seized the momentum in the 18-month-old fight against the jihadists.
The Pentagon releases nearly 200 photographs linked to allegations of abuse by the US military in Iraq and Afghanistan over a decade ago.
Donald Trump's anti-Muslim rhetoric undermines US national security by boosting the Islamic State (IS) group, the Pentagon warns.
US forces have carried out an air strike targeting the Islamic State group militant "Jihadi John", the Pentagon has said.
Russia is to hold more talks with the US on air safety during the two countries’ Syrian bombing campaigns, says the Pentagon.
Islamic State (IS) has lost more than a quarter of its territory in Iraq since US-led coalition air strikes began in August, the Pentagon has said.
US defence department confirms that it has killed al-Shabab leader Adan Garar