<a href="https://en.wikipedia.org/wiki/1961_Goldsboro_B-52_crash" id="mwuA" rel="mw:WikiLink" title="1961 Goldsboro B-52 crash">Goldsboro B-52 crash</a>: A bomber carrying two <a href="https://en.wikipedia.org/wiki/Thermonuclear_weapon" id="mwuQ" rel="mw:WikiLink" title="Thermonuclear weapon">H-bombs</a> breaks up in mid-air over North Carolina. The uranium core of one weapon remains lost.