Trump inauguration live updates: Donald Trump moves swiftly to implement his new agenda

Trump also signed an order withdrawing the United States from the Paris Agreement.

The agreement was originally ratified at the annual United Nations Climate Conference in 2015. It intended to limit global warming to 1.5 degrees Celsius, compared to pre-industrial levels -- a metric scientists believed would significantly reduce the impacts of climate change.

During his first term in office, Trump withdrew from the agreement; Biden re-entered it on his first day in office.

Read more about Trump's climate agenda here.

Following his remarks, Trump sat down at a desk in the Capital One Arena to sign what he previewed as a wide range of executive orders.

The first order rescinded 78 Biden-era executive actions, executive orders, presidential memoranda and others.

President Donald Trump spoke at an an indoor Presidential Inauguration parade event at Capital One Arena on Monday.

The crowd booed loudly when Trump brought up Joe Biden's last-minute pardons for members of his family.

"Did you know that Biden, while I was making my speech, pardoned his whole family? The brother. The whole deal was pardoned. Can you imagine that?" Trump said.

"Most of those bureaucrats are being fired. They are gone," Trump said.

He also said he will force thousands of federal employees to return to in-person work.

Trump is running through many of his campaign promises, some of which will be easier to accomplish than others.

"I'm revoking nearly 80 destructive radical executive actions of the previous administration," he said.