Declaring "America is back," President-elect Joe Biden introduced his national security team, his first substantive offering of how he'll shift from Trump-era "America First" policies by relying on experts from the Democratic establishment to be some of his most important advisers.

"Together, these public servants will restore America globally, its global leadership and its moral leadership," Biden said Tuesday from a theatre in his long-time home of Wilmington, Delaware. "It's a team that reflects the fact that America is back, ready to lead the world, not retreat from it."