Prior to world war i, tensions in the balkans were most related to which main cause of the war?

The two years prior to World War I in the region of the Balkans saw the rising of Serbian nationalistic Groups. Later came the assassination of the Archduke Ferdinand in the Balkan City of Sarajevo, main cause of the war.

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valentina tereshkova

soviet cosmonaut valentina tereshkova became the first woman to fly to space when she launched on the vostok 6 mission june 16, 1963. valentina tereshkova was the first woman to go into space. in 1963, she spent almost three days in space and orbited earth 48 times in her space capsule, vostok 6.jan 22, 2018