US President-elect Joe Biden formally introduced his nominees for his Cabinet on Tuesday as the Donald Trump administration finally paved way for transition, reported AFP.

The 78-year-old President-elect revealed the names of his secretary of state, national security advisor, secretary of homeland security, and other top officials on Monday.

Biden and Vice-President-elect Kamala Harris presented the nominees at an event at the Queen theater in Biden’s hometown of Wilmington, Delaware.

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Shortly, before the Biden event was to begin, Trump appeared in the White House briefing room to make brief unscheduled remarks.

Biden’s public unveiling of his nominees came after Trump signed off on the start of the White House transition while still refusing to concede the November 3 election.

The outgoing president acknowledged on Monday it was time for the General Services Administration (GSA) to unblock funding for the Biden transition team.

Unveiling the cabinet selections, the Biden team said they were “experienced, crisis-tested leaders who are ready to hit the ground running on day one.”

The names unveiled by Biden included veterans of the Barack Obama administration and signals a return to traditional US diplomacy.

Former State Department number two Antony Blinken was tapped to be secretary of state while Jake Sullivan, who advised Biden when he was vice president under Obama, was nominated to be national security advisor.

Biden named the first woman, Avril Haines, as director of national intelligence, and Cuban-born Alejandro Mayorkas to head the Department of Homeland Security, whose policing of tough immigration restrictions under Trump was a frequent source of controversy.

Following through on his campaign promise to raise the profile of global warming threats, Biden named former secretary of state John Kerry as a new special envoy on climate issues.

Blinken is expected to spearhead a dismantling of Trump’s “America First” policies, including rejoining the Paris climate agreement and the World Health Organization and resurrecting the Obama-crafted Iran nuclear deal.

Career diplomat Linda Thomas-Greenfield was nominated to be UN ambassador while former Federal Reserve chairwoman Janet Yellen is expected to be named Treasury Secretary, the first woman to hold the job.