Let's begin our world news in the U.S.
The Democrats will launch the public phase of their impeachment inquiry against President Trump this week. with a slew of televised hearings that promise to be blockbuster viewing.
As you'd expect, President Trump is firing back on Twitter.
For more on this and other news around the world, let's turn to our Kim Da-mi.
Da-mi, tell us more about the president's tweets.
Mark, with the public hearings starting on Wednesday, local time, President Trump has been tweeting relentlessly to defend his stance and attack the Democrats.
Let's start with his latest one on Tuesday.
Trump said he will be "releasing the transcript of the first, and therefore more important, phone call with the Ukrainian President" in the coming days.
It appears the move is aimed at highlighting there was no unfair external pressure on Ukraine to investigate his political rivals.
President Trump also complained that Democrats are relying on "2nd and 3rd hand witnesses," arguing that many of them are so called "Never Trumpers."
He then reiterated that all they need to do is read the transcript with his Ukrainian counterpart.
President Trump also attacked Democratic presidential candidate Joe Biden and his son Hunter, urging an investigation against them.
He said Joe Biden should testify about allegations he abused his power by pressuring a Ukrainian prosecutor to resign to stop any investigation of his son's lucrative role on the board of a Ukrainian gas firm.
The impeachment inquiry officially enters the public-facing phase on Wednesday with William Taylor, the top U.S. diplomat in Ukraine and Deputy Assistant Secretary of State George Kent, testifying before the House.
Former U.S. Ambassador to Ukraine Marie Yovanovitch will be in the hotseat on Friday.