Donald Trump has warned Russia that he may send Ukraine long-range Tomahawk missiles if Moscow does not settle its war.
It comes ahead of another meeting between the US President and his Ukrainian counterpart Volodymyr Zelenskyy at the White House later this week.
But Russia has voiced concerns the transfer could cross a red line if the weapons are used on Russian soil.
We hear from retired US Air Force Colonel Cedric Leighton about the Russian concerns and whether they stack up.
Reporter: Luke Siddham Dundon