Why Ukrainians are protesting against Zelenskyy's dismissal of defence minister

Protesters in Kyiv called for the dismissal of Ukraine's commander-in-chief, Oleksandr Syrskyi, after Volodymyr Zelenskyy removed the popular defence minister Mykhailo Fedorov in a move to back Syrskyi. The Ukraine president defended his decision, saying there had been a 'challenging dialogue' between Fedorov and Syrskyi. The Guardian's Luke Harding reports