A U.S. Border Patrol agent killed during a traffic stop near the Canadian border worked security duty at the Pentagon during the time of the Sept. 11 attacks.

The federal officer killed while on duty near the Canadian border has been identified as a U.S. Air Force veteran who provided security at the Pentagon during the Sept. 11 attacks.

David "Chris" Maland, the U.S. Border Patrol agent allegedly killed by a German national during a traffic stop near the Vermont-Canada border on Monday, was an Air Force veteran.

U.S. officials say the Pentagon will begin deploying as many as 1,500 active duty troops to help secure the southern border in the coming days.

The Pentagon is sending some 1,500 troops to help secure the southern border as President Trump pushes to stem the tide of migrants entering the country. Acting Defense Secretary Robert Salesses is expected to sign a release order on Wednesday,

A portrait of retired Gen. Mark Milley, a target of President Donald Trump's wrath, disappeared from a Pentagon hallway hours after the inauguration.

The Pentagon on Monday removed the portrait of Mark Milley, the retired Army general and former chairman of the Joint Chiefs of Staff, according to two Reuters witnesses, in a move that happened within two hours of President Donald Trump's inauguration.