The Pentagon says Ukrainian forces are trying to take back some territory from Russian troops, while in the south, Russian naval ships join the attack on Mariupol. Meanwhile, Russia’s foreign minister warns against a Polish proposal to send peacekeepers to Ukraine, as President Joe Biden heads to Europe for a series of summits aimed to end the fighting there. Moderna says its Covid-19 vaccine shows similar benefits in children and young adults, ahead of its plan to ask the FDA for authorization. A majority of Americans support Ketanji Brown Jackson’s SCOTUS nomination, according to a Gallup poll. And, retiring at the ripe old age...of 25.