World security takes centre stage

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World leaders including the Ukrainian President are gathered in Germany for the Munich Security Conference. It's seen as the leading global gathering on defence matters, at a time when security issues are high on everyone's agenda. Participants include 40 heads of state and government and nearly 100 ministers. Russia has not been invited this year, nor has Iran - but China is sending one of its top diplomats. (Picture: The Munich Security Conference. Credit: Getty Images.)