jeremy bowen, bbc news, kyiv. president zelensky says abouti,300 ukrainian troops have been killed since the start of russia's invasion. he told journalists in kyiv that far larger numbers of russian soldiers had died — perhaps ten times as many, but those figures can't be verifed. as russian forces continued to shell kyiv, mr zelensky said they'd have to destroy the capital and its population to occupy it. our security correspondent, frank gardner, has this assessment of russian�*s military strategy. it looks like, and it feels like, the beginning of the endgame — although who knows how long that's going to last? if we look at the map here on day 17, the red areas are where russian forces have taken control. in the south, they continue to make advances. they are pushing to the north—west. in the north is where the real battle is going to be fought. that's for the capital,