White House National Security Council spokesman John Kirby on Sunday defended President Biden's controversial decision to send cluster munitions to Ukraine. "This is about keeping Ukraine in the fight. You were just there. You talked to President Zelenskyy about the counteroffensive, and in some ways, it’s not going as fast as he would like," Kirby told host Martha Raddatz during an appearance on ABC's "This Week." "They are using artillery at a very accelerating rate, Martha, many thousands of rounds per day. This is literally a gunfight in – all along, from the Donbas, all the way down toward Zaporizhzhia...