U.S. President Joe Biden will on Thursday mark the one-year anniversary of the deadly Jan. 6 assault at the U.S. Capitol by honoring the bravery of law enforcement on the scene, and outlining the unfinished work the nation needs to do to strengthen its democracy, the White House has said.

"On Thursday, the president is going to speak to the truth of what happened — not the lies that some have spread since — and the peril it has posed to the rule of law and our system of democratic governance," White House spokesperson Jen Psaki told reporters Tuesday afternoon, in the first preview of the president's remarks.

Biden and Vice President Kamala Harris, both Democrats, will speak on Thursday morning at the U.S. Capitol, one year after a mob loyal to former U.S. President Donald Trump raided the complex in a failed attempt to stop the counting of Electoral College votes that officially delivered Biden's election victory.