In a brief address from his Mar-a-Lago estate in Florida, President Trump announced the appointment of General Herbert "H.R." McMaster as his national security adviser.

McMaster replaces Gen. Michael Flynn [Ret.], who resigned last week.

Report: Flynn Apologized to Pence Over Phone Call With Russian Ambassador

National Security Adviser Michael Flynn Resigns

Krauthammer on Flynn Controversy: Trump 'Loses One Way or Another'

Trump also said General J. Keith Kellogg, who was serving as acting national security adviser, will continue to serve the administration in a related role.

He called McMaster a "tremendous talent [with] tremendous experience."

McMaster, 54, is a three-star general who served in the Persian Gulf as a well as the War on Terror, and is the recipient of more than a dozen military service awards.

The general also penned a book that critiqued former President Lyndon Johnson and his defense secretary, Robert McNamara's handling of Vietnam War policy, describing how the administration circumvented the joint chiefs of staff at the time.

Trump also announced that former Ambassador to the United Nations John Bolton will serve the administration in another related capacity.

Reports circulated last week that Bolton, a Fox News contributor, was in the running to replace Flynn.

What do you think? Let us know in the comments below.

Lt. Gen. Flynn: Why Is Obama Talking About Climate Instead of Orlando?

Bob Woodward: We Didn't Get the Full Story Behind Flynn Resignation

Top Democrats, New York Times Fall for Fake Flynn Twitter Account