<a class="mw-redirect" href="https://en.wikipedia.org/wiki/Preparedness_Day_Bombing" id="mwvQ" rel="mw:WikiLink" title="Preparedness Day Bombing">Preparedness Day Bombing</a>: In <a href="https://en.wikipedia.org/wiki/San_Francisco" id="mwvg" rel="mw:WikiLink" title="San Francisco">San Francisco</a>, a bomb explodes on <a href="https://en.wikipedia.org/wiki/Market_Street_(San_Francisco)" id="mwvw" rel="mw:WikiLink" title="Market Street (San Francisco)">Market Street</a> during a parade, killing ten and injuring 40.