<a href="https://en.wikipedia.org/wiki/Viking_program" id="mwASY" rel="mw:WikiLink" title="Viking program">Viking program</a>: <i id="mwASc"><a href="https://en.wikipedia.org/wiki/Viking_2" id="mwASg" rel="mw:WikiLink" title="Viking 2">Viking 2</a></i> enters orbit around <a href="https://en.wikipedia.org/wiki/Mars" id="mwASk" rel="mw:WikiLink" title="Mars">Mars</a>.<sup about="#mwt185" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"NASA-20061218"},"body":{"id":"mw-reference-text-cite_note-NASA-20061218-35"}}' id="cite_ref-NASA-20061218_35-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./August_7#cite_note-NASA-20061218-35" id="mwASo" style="counter-reset: mw-Ref 35;"><span class="mw-reflink-text" id="mwASs">[35]</span></a></sup>