Washington (CNN)President-elect Joe Biden marks a milestone on his path to the White House Monday when he gets his first President's Daily Brief -- the intelligence community's collection of secrets, intelligence, and analysis about long- and short-term threats US leaders need to know to run the country and keep it safe.

President Donald Trump, who has refused to concede the election, relented only last week on his initial refusal to allow Biden access to the nation's most vital intelligence -- a tradition based on US national security interests to ensure the election's winner and their incoming team are as ready as possible to cope with global threats and challenges. In 2016, Trump received his first PDB, as it is known, a week after the election.

Vice President-elect Kamala Harris will get the same briefing on Monday with Biden, the transition team said Wednesday, ending the strange situation where she, as a member of the Senate Intelligence Committee, had access to more classified intelligence than the President-elect.