While the attention has been on the ground, there is a battle for control of the air.

Russian soldiers have attacked many Ukrainian cities, and for the first time since the war began, people have crossed the border between Poland and Ukraine to return home rather than flee, believing their cities were safer. However, this morning, Lviv, and other cities across Ukraine have experienced missile strikes and rocket attacks, updates from BBC journalists located in several Ukrainian cities. Today's Nick Robinson spoke with BBC's Dan Johnson, Yuri Sak, Ukraine's defence minister, Jonathan Beale, BBC Defence correspondent in Dnipro, and Sir Simon Mayall, former deputy chief of the defence staff. (Image Credit:REUTERS/Roman Baluk)