US President Donald Trump Names HR McMaster As National Security Advisor Monday Feb 20,2017

US President Donald Trump named US Army Lieutenant General H.R. McMaster as his new national security advisor on Monday Feb 20,2017, taking over the post left vacant after Michael Flynn's resignation.

Trump called McMaster, a career Army officer and prominent expert on counterinsurgency warfare, a "man of tremendous talent and tremendous experience."

"He is highly respected by everyone in the military and we're very honored to have him," Trump told reporters at his Mar-a-Lago residence in Palm Beach, Florida.

He spoke sitting alongside McMaster, who was dressed in uniform. Trump said McMaster would work alongside acting national security advisor Keith Kellogg, a retired three-star general, in a "very, very special" collaboration. 

McMaster, who heads the Army Capabilities and Integration Center and is deputy commanding general of the Futures Center at US Army Training and Doctrine Command at Fort Eustis, previously directed a transparency task force in Afghanistan.

He also held key roles in the Iraq War and Gulf War, and is known for his criticism of the US military's involvement in the Vietnam War. 

One of the books he authored is pointedly titled "Dereliction of Duty: Lyndon Johnson, Robert McNamara, the Joint Chiefs of Staff and the Lies That Led to Vietnam" (1997).