From crash to crisis. How Russia's refusal to take responsibility for a downed passenger plane wrecked relations with Azerbaijan / 'A tragic incident in Russia's airspace'. How Putin was forced into a reluctant half-apology over the Azerbaijan Airlines plane crash / What caused the Azerbaijan Airlines crash? Here's what we know so far. / Ukraine-Russia war latest: UK condemns 'reckless' Kremlin after Putin's apology over Azerbaijan Airlines crash / Putin: Azerbaijan plane crash was a 'tragic incident' / Speculation mounts over Russia's involvement in deadly Azerbaijan Airlines plane crash / Azerbaijan Airlines crash: How brave pilots battled to save jet after being 'hit by Russian missile' / Harrowing footage shows passengers moments before fireball plane crash in Kazakhstan as jet 'likely shot down by Russia' / What we know about the Azerbaijan Airlines jet crash that killed 38 people / New details on Kazakhstan plane crash as questions emerge about Russian involvement