I'm in Ukraine as Putin continues to bomb the country - 1 thing has taken me by surprise / US challenges Russia to step back from Ukraine attack / US threatens to quit Russia-Ukraine effort unless 'concrete proposals' / Putin wants a 3-day ceasefire for WWII anniversary next month. Ukraine says why wait? / Forbidden Stories: a journalist's disappearance in Russian-occupied Ukraine / War in Ukraine: Putin announces surprise May 8-10 truce / Plans for Ukraine can only be discussed in closed mode -- Kremlin / 'Sit down and make a deal', Trump orders Putin as he says Ukraine's battlefields are 'covered in body parts' / Critical week for US's future in Ukraine-Russia talks, Rubio says / Ukraine 'one step away from nuclear meltdown' as Russian bombardment continues