Russia recently vowed to escalate attacks on Kyiv. Ukraine has been striking deeper inside Russia. NBC News chief foreign correspondent Keir Simmons covers the war and is reporting this week from St. Petersburg, Russia, at President Vladimir Putin’s International Economic Forum. Simmons will answer readers’ questions on location during a livestream for subscribers at 1 p.m. ET Thursday. Ask Simmons anything — about reporting from conflict zones, the latest in geopolitics or what it’s like to