crisis
... that two 1963 bombings in Birmingham, Alabama , caused a crisis that eventually involved 18,000 federal troops?
... that two 1963 bombings in <a href="./Birmingham,_Alabama" id="mwCzs" rel="mw:WikiLink" title="Birmingham, Alabama">Birmingham, Alabama</a> <i id="mwCzw">(effects pictured)</i>, caused a <b id="mwCz0"><a class="mw-redirect" href="./Birmingham_crisis" id="mwCz4" rel="mw:WikiLink" title="Birmingham crisis">crisis</a></b> that eventually involved 18,000 federal troops?