कौन सा नेता पेरेस्त्रोइका और ग्लासनोस्त सुधारों से जुड़ा है जिसके परिणामस्वरूप अंततः सोवियत संघ का विघटन हुआ?

Eleanor Roosevelt played a pivotal role as the Chair of the UN Human Rights Commission in drafting which historical document?

Idi Amin was a military dictator of which African nation during the 1970s?

The famous 'Iron Curtain' speech (1946) is associated with which of the following leaders?