A protest against pro-Catholic discrimination during the <a href="https://en.wikipedia.org/wiki/Buddhist_crisis" id="mwASQ" rel="mw:WikiLink" title="Buddhist crisis">Buddhist crisis</a> is held outside <a href="https://en.wikipedia.org/wiki/South_Vietnam" id="mwASU" rel="mw:WikiLink" title="South Vietnam">South Vietnam</a>'s National Assembly, the first open demonstration during the eight-year presidency of <a href="https://en.wikipedia.org/wiki/Ngo_Dinh_Diem" id="mwASY" rel="mw:WikiLink" title="Ngo Dinh Diem">Ngo Dinh Diem</a>.