U.S. President <a href="https://en.wikipedia.org/wiki/Calvin_Coolidge" id="mwtA" rel="mw:WikiLink" title="Calvin Coolidge">Calvin Coolidge</a> signs a bill by <a href="https://en.wikipedia.org/wiki/United_States_Congress" id="mwtQ" rel="mw:WikiLink" title="United States Congress">Congress</a> establishing the <a href="https://en.wikipedia.org/wiki/Federal_Radio_Commission" id="mwtg" rel="mw:WikiLink" title="Federal Radio Commission">Federal Radio Commission</a> (later replaced by the <a href="https://en.wikipedia.org/wiki/Federal_Communications_Commission" id="mwtw" rel="mw:WikiLink" title="Federal Communications Commission">Federal Communications Commission</a>) which was to regulate the use of radio frequencies in the United States.