Why has the US allowed Ukraine use long-range missiles inside Russia?

Social Issues

Ukraine has been using ATACMS on Russian targets in occupied Ukrainian territory for more than a year.
But the US has never allowed Kyiv to use the ATACMS inside Russia – until now.
Ukraine had ar... gued that not being allowed to use such weapons inside Russia was like being asked to fight with one hand tied behind its back.
The change in policy reportedly comes in response to the recent arrival of North Korean troops to support Russia in the Kursk border region, where Ukraine has occupied territory since August.
Also, Donald Trump’s imminent return to the White House is raising fears over the future of US support for Ukraine, and President Biden is apparently keen to do all he can to help in the little time he has left in office.
Strengthening Ukraine's hand militarily – so the thinking goes - could grant Ukraine leverage in any peace talks that may lie ahead.
Ukrainian President Volodymyr Zelensky has not yet confirmed the move. But he said on Sunday: "Strikes are not made with words ... The missiles will speak for themselves."