An <a class="mw-redirect" href="https://en.wikipedia.org/wiki/F-104_Starfighter" id="mw5w" rel="mw:WikiLink" title="F-104 Starfighter">F-104 Starfighter</a> collides with <a class="mw-redirect" href="https://en.wikipedia.org/wiki/XB-70_Valkyrie" id="mw6A" rel="mw:WikiLink" title="XB-70 Valkyrie">XB-70 Valkyrie</a> prototype no. 2, destroying both aircraft during a photo shoot near <a href="https://en.wikipedia.org/wiki/Edwards_Air_Force_Base" id="mw6Q" rel="mw:WikiLink" title="Edwards Air Force Base">Edwards Air Force Base</a>. <a href="https://en.wikipedia.org/wiki/Joseph_A._Walker" id="mw6g" rel="mw:WikiLink" title="Joseph A. Walker">Joseph A. Walker</a>, a <a href="https://en.wikipedia.org/wiki/NASA" id="mw6w" rel="mw:WikiLink" title="NASA">NASA</a> test pilot, and Carl Cross, a <a href="https://en.wikipedia.org/wiki/United_States_Air_Force" id="mw7A" rel="mw:WikiLink" title="United States Air Force">United States Air Force</a> test pilot, are both killed.