a></td>
<td></td>
<td> ?</td>
<td></td>
</tr>
<tr>
<td><a class="image" href="//en.wikipedia.org/wiki/File:Sikorsky_S-55_inflight_c.jpg"><img alt="Sikorsky S-55 inflight c.jpg" data-file-height="777" data-file-width="1000" height="117" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Sikorsky_S-55_inflight_c.jpg/150px-Sikorsky_S-55_inflight_c.jpg" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Sikorsky_S-55_inflight_c.jpg/225px-Sikorsky_S-55_inflight_c.jpg 1.5x, //upload.wikimedia.org/