First flight of the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Convair_B-36" id="mw1Q" rel="mw:WikiLink" title="Convair B-36">Convair B-36</a>, the world's first mass-produced nuclear weapon delivery vehicle, the heaviest mass-produced piston-engined aircraft, with the longest wingspan of any military aircraft, and the first bomber with intercontinental range.