Ukraine's new tanks an upgrade - but may arrive too late

The M1 Abrams tanks the US will send to Ukraine are a significant upgrade in the arming of Kyiv, but will not make any difference to the next phase of the war.
The decision to send them is an abrupt reversal after longstanding Pentagon arguments that they are a poor fit for the Ukrainian battlefield.
But the announcement itself does make a difference.
"It unlocks the German decision to send Leopard 2 tanks and for others who have Leopard tanks to send them as well," Kurt Volker, the former US...