U.S. President <a href="https://en.wikipedia.org/wiki/Lyndon_B._Johnson" id="mw5g" rel="mw:WikiLink" title="Lyndon B. Johnson">Lyndon B. Johnson</a> declares a national day of mourning following the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Assassination_of_Senator_Robert_F._Kennedy" id="mw5w" rel="mw:WikiLink" title="Assassination of Senator Robert F. Kennedy">assassination of Senator Robert F. Kennedy</a>.