The roof of one of the buildings at the <a href="https://en.wikipedia.org/wiki/Katowice_International_Fair" id="mwAVo" rel="mw:WikiLink" title="Katowice International Fair">Katowice International Fair</a> in Poland <a href="https://en.wikipedia.org/wiki/Katowice_Trade_Hall_roof_collapse" id="mwAVs" rel="mw:WikiLink" title="Katowice Trade Hall roof collapse">collapses</a> due to the weight of snow, killing 65 and injuring more than 170 others.