Key developments on March 15: Russian missile strike kills 20, injures 73 in Odesa, first responders among victimsScholz, Macron, Tusk vow more arms purchases, new initiatives for UkraineRussia recruits more foreign mercenaries to fight in war, Ukraine saysSyrskyi: Russia trying to break through in Avdiivka direction, Ukraine facing ‘intense artillery fire’Russia launched two Iskander-M missiles against Odesa on March 15, killing at least 20 people and injuring over 70 as of 8 p.m. local time, officials said. First responders and police officers were among the victims. Russian forces employed …