U.S. President Donald Trump on Monday appointed a new National Security Adviser to succeed his disgraced former adviser, Mike Flynn.

The newly appointed NSA, Lt Gen HR McMaster, who was described by Trump as “a man of tremendous talent and tremendous experience” will take the place of Flynn who sacked after 23 days in the job, after it was revealed that he had lied about a private conversation with a Russian diplomat.

Trump announced the appointment of McMaster at his Palm Beach club, Mar-a-Lago.

He said retired army Lt Gen Keith Kellogg, who had been his acting adviser, will now serve as the National Security Council chief of staff.

Retired Vice Admiral Robert Harward, Trump’s first choice to replace Flynn, turned down the offer based on the President’s refusal to meet some of his demands.