President Donald Trump is spending his first full day back in the White House meeting with congressional leaders, announcing an investment in artificial intelligence infrastructure and demonstrating one of his favored expressions of power: firing people.

At noon today, Donald Trump takes the presidential oath for a second time, capping a historic political comeback to the White House. The ceremony has been moved inside to the U.S. Capitol Rotunda because of frigid weather for only the first time since Ronald Reagan's second inauguration 40 years ago.

A historic transition of power unlike any since the 19th century unfolded throughout Monday, Jan. 20, as President Donald Trump was sworn in for a rare nonconsecutive White House term. PEOPLE followed