Hello and welcome to NewsHour live from the BBC World Service in London.
I'm Rebecca Kesby.
In less than 24 hours, Presidents Trump and Putin will take part in an historic summit in Alaska,
beginning with a breakfast meeting, we're told.
Mr Putin doesn't leave Russia very often.
There are 124 countries in the world where border officials would be obliged to arrest him
if he arrived there.
Those are countries that are signatories to the Rome Statute of the International Criminal Court.
The ICC has an arrest warrant out on Vladimir Putin.
It alleges that there are reasonable grounds to believe Mr Putin Putin bears individual criminal responsibility for the unlawful deportation of children from Ukraine to Russia.
That would be a war crime.
We'll look in detail at Ukraine's missing children in a moment.
Luckily though for Mr Putin the United States did not sign up to the Rome Statute so these face-to-face talks with Mr Trump can happen on US soil.
There's a lot at stake.
Mr Trump is keen to play peacemaker and get a ceasefire in eastern Ukraine.
Mr Putin Putin is under pressure to prove he's serious about ending the war.
This is what he had to say this morning.
I would like to tell you about the stage we are at with the current American administration which as everyone here knows is making in my opinion quite energetic and sincere efforts to stop the fighting.
end the crisis and reach agreements of interest to all parties involved in this conflict.
But Ukraine's President Volodymyr Zelensky has not been invited to Alaska.