<page_title> Lockheed A-12 </page_title> <section_title> M-21 </section_title> <table> <cell> 60-6932 <col_header> Serial number </col_header> </cell> <cell> 129 <col_header> Article </col_header> </cell> <cell> Lost 1968 <col_header> Fate </col_header> </cell> </table>
In 1968, 60-6932's article 129 was lost.