The Senate has confirmed Army veteran and former defense industry lobbyist Mark Esper as secretary of defense.
President Donald Trump says Acting Secretary of Defense Patrick Shanahan is withdrawing his nomination.
The Pentagon says the acting defense secretary, Patrick Shanahan, has approved a plan to send about 320 more troops to the U.S.-Mexican border to provide additional support, such as driving Customs and Border Protection vehicles to transport migrants.
A U.S. official says the Pentagon's watchdog agency has cleared Acting Defense Secretary Patrick Shanahan of wrongdoing.
Acting Defense Secretary Patrick Shanahan is confirming that North Korea conducted a test launch on Wednesday, but he declined to provide any details. He is the first U.S. official to confirm the launch.
The White House says that all Islamic State held territory in Syria has been"100 percent" eliminated.
The sooner-than-expected departure of Defense Secretary Jim Mattis now shifts the focus to President Donald Trump's appointment of an acting Pentagon chief and plans for a permanent replacement.
President Donald Trump says he's naming deputy defense chief Patrick Shanahan as acting secretary.