Media Said Biden's Election Meant 'Competence Is Making a Comeback.' So How Did the Defense Secretary Go AWOL?

WATCH: Lloyd Austin Hospitalization Shows Biden's 'Transparent' White House Is Anything But

Inside the Ring: Trump Administration Gets Third Defense Chief

Shanahan Withdraws From Consideration to Be U.S. Defense Secretary

China Tests New Sub-Launched Strategic Missile

JL-3 flight test timed to Shanahan visit to Singapore

Mattis Announces Name Change for U.S. Pacific Command

Mattis Dismisses Rumors He Disagreed With Trump on Syria Strikes

Mattis Dismisses Rumors of Apprehension About Working With John Bolton

'Last time I checked, he's an American. I can work with an American, OK?'

Mattis Showcases Softer Side in Note to U.S. Olympian

Mattis Warns of Consequences for Military if Congress Doesn't Pass Defense Budget