'America is back': Biden says US 'ready to lead' again as he unveils cabinet picks
- President-elect pledges global role and emphasises climate fight
- ‘Close friend’ John Kerry to be America’s full-time climate leader
- US politics – live coverage
President-elect Joe Biden formally introduced his first round of cabinet nominations on Tuesday, a move broadly welcomed as a restoration of the old Washington and international order after the turmoil of the Trump administration.