As Germany prepares to host the Munich Security Conference later this month, several international leaders and German political parties are to be excluded from this year’s gathering, according to the chairman of the defence forum. The governments of Russia and Iran have not been invited to join some 50 leaders and around 100 ministers due to attend the meeting which is taking place from February 16 to 18. The annual conference is an independent forum for security policy decision makers to debate current and future challenges. Attendees usually include heads of states, governments and internati…